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Revenue from Contract with Customer [Text Block]

Revenue Information

The following table disaggregates the Company’s revenue into primary product groups:

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Audio Conferencing	$	2,889	$	3,593	$	5,600	$	7,252
Microphones		2,230		2,255		4,336		4,565
Video products		1,301		1,123		2,789		2,443
	$	6,420	$	6,971	$	12,725	$	14,260

The following table disaggregates the Company’s revenue into major regions:

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
North and South America	$	3,493	$	4,111	$	7,253	$	8,456
Asia (including Middle East) and Australia		1,969		1,861		3,833		3,899
Europe and Africa		958		999		1,639		1,905
	$	6,420	$	6,971	$	12,725	$	14,260

Note 3 - Earnings (Loss) Per Share

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Text Block]

Earnings (Loss) Per Share

Earnings (loss) per common share is computed based on the weighted-average number of common shares outstanding and, when appropriate, dilutive potential common stock outstanding during the period. Stock options are considered to be potential common stock. The computation of diluted earnings (loss) per share does

not

assume exercise or conversion of securities that would have an anti-dilutive effect.

Basic earnings (loss) per common share is the amount of net earnings (loss) for the period available to each weighted-average share of common stock outstanding during the reporting period. Diluted earnings (loss) per common share is the amount of earnings (loss) for the period available to each weighted-average share of common stock outstanding during the reporting period and to each share of potential common stock outstanding during the period, unless inclusion of potential common stock would have an anti-dilutive effect.

The following table sets forth the computation of basic and diluted earnings (loss) per common share:

	Three months ended June 30,						Six months ended June 30,
	201 9			201 8			201 9			201 8
Numerator:
Net loss	$	(2,098	)	$	(2,163	)	$	(4,447	)	$	(4,009	)
Denominator:
Basic weighted average shares outstanding		16,630,770			8,301,094			16,630,684			8,304,093
Dilutive common stock equivalents using treasury stock method		—			—			—			—
Diluted weighted average shares outstanding		16,630,770			8,301,094			16,630,684			8,304,093

Basic loss per common share	$	(0.13	)	$	(0.26	)	$	(0.27	)	$	(0.48	)
Diluted loss per common share	$	(0.13	)	$	(0.26	)	$	(0.27	)	$	(0.48	)

Weighted average options outstanding		569,997			724,373			578,543			736,160
Anti-dilutive options not included in the computations		569,997			724,373			578,543			736,160

Note 4 - Marketable Securities

6 Months Ended

Jun. 30, 2019

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

Marketable Securities

The Company has classified its marketable securities as available-for-sale securities. These securities are carried at estimated fair value with unrealized holding gains and losses included in accumulated other comprehensive income (loss) in stockholders’ equity until realized. Gains and losses on marketable security transactions are reported on the specific-identification method. Dividend and interest income are recognized when earned.

The amortized cost, gross unrealized holding gains, gross unrealized holding losses, and fair value for available-for-sale securities by major security type and class of securities at

June 30, 2019

and

December 31, 2018

were as follows:

	Amortized cost		Gross unrealized holding gains		Gross unrealized holding losses			Estimated fair value
June 30 , 2019
Available-for-sale securities:
Corporate bonds and notes	$	5,756	$	96	$	(7	)	$	5,845
Municipal bonds		4,082		20		(1	)		4,101
Total available-for-sale securities	$	9,838	$	116	$	(8	)	$	9,946

December 31, 2018
Available-for-sale securities:
Corporate bonds and notes	$	2,911	$	1	$	(31	)	$	2,881
Municipal bonds		1,849		—		(15	)		1,834
Total available-for-sale securities	$	4,760	$	1	$	(46	)	$	4,715

Maturities of marketable securities classified as available-for-sale securities were as follows at

June 30, 2019:

	Amortized cost		Estimated fair value
Due within one year	$	3,081	$	3,092
Due after one year through five years		6,757		6,854
Due after five years		—		—
Total available-for-sale securities	$	9,838	$	9,946

Debt securities in an unrealized loss position as of

June 30, 2019

were

not

deemed impaired at acquisition and subsequent declines in fair value are

not

deemed attributed to declines in credit quality. Management believes that it is more likely than

not

that the securities will receive a full recovery of par value, although there can be

assurance that such recovery will occur. The available-for-sale marketable securities with continuous gross unrealized loss position for less than

months and

months or greater and their related fair values were as follows:

	Less than 12 months					More than 12 months					Total
	Estimated fair value		Gross unrealized holding losses			Estimated fair value		Gross unrealized holding losses			Estimated fair value		Gross unrealized holding losses
As of June 30 , 2019
Corporate bonds and notes	$	293	$	(5	)	$	562	$	(2	)	$	855	$	(7	)
Municipal bonds		—		—			690		(1	)		690		(1	)
Total	$	293	$	(5	)	$	1,252	$	(8	)	$	1,545	$	(8	)

Note 5 - Intangible Assets

6 Months Ended

Jun. 30, 2019

Business Combinations, Goodwill and Intangibles Disclosure [Text Block]

Intangible Assets

Intangible assets as of

June 30, 2019

and

December 31, 2018

consisted of the following:

	Estimated useful lives (years)			June 30 , 2019			December 31, 2018
Tradename	5	to	7	$	555		$	555
Patents and technological know-how		10			15,653			13,377
Proprietary software	3	to	15		2,981			2,981
Other	3	to	5		323			323
Total intangible assets					19,512			17,236
Accumulated amortization					(7,641	)		(6,987	)
Total intangible assets, net				$	11,871		$	10,249

The amortization of intangible assets for the

three

and

six

months ended

June 30, 2019

and

2018

was as follows:

	Three months ended June 30,						Six months ended June 30,
	2019			2018			2019			2018
Amortization of intangible assets	$	(336	)	$	(265	)	$	(700	)	$	(513	)

The estimated future amortization expense of intangible assets is as follows:

Years ending December 31,	Amount
2019 (Remainder)	$	656
2020		1,175
2021		1,175
2022		1,175
2023		1,168
Thereafter		6,522
Total		11,871

Note 6 - Inventories

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Text Block]

Inventories

Inventories, net of reserves, as of

June 30, 2019

and

December 31, 2018

consisted of the following:

	June 30 , 2019		December 31, 2018
Current:
Raw materials	$	482	$	1,795
Finished goods		11,776		11,433
	$	12,258	$	13,228

Long-term:
Raw materials	$	2,039	$	2,165
Finished goods		5,676		6,788
	$	7,715	$	8,953

Long-term inventory represents inventory held in excess of our current (next

months) requirements based on our recent sales and forecasted level of sales. We expect to sell the above inventory, net of reserves, at or above the stated cost and believe that

loss will be incurred on its sale, although there can be

assurance of the timing or amount of any sales.

Net loss incurred on valuation of inventory at lower of cost or market value and write-off of obsolete inventory for the

three

and

six

months ended

June 30, 2019

and

2018

was as follows:

	Three months ended June 30,						Six months ended June 30,
	2019			2018			2019			2018
Net loss incurred on valuation of inventory at lower of cost or market value and write-off of obsolete inventory	$	(183	)	$	(170	)	$	(368	)	$	(425	)

Note 7 - Leases and Deferred Rent

6 Months Ended

Jun. 30, 2019

Lessee, Operating Leases [Text Block]

Leases and Deferred Rent

Rent expense is recognized on a straight-line basis over the period of the lease taking into account future rent escalation and holiday periods.

Rent expense for the

three

and

six

months ended

June 30, 2019

and

2018

was as follows:

	Three months ended June 30,						Six months ended June 30,
	2019			2018			2019			2018
Rent expense	$	(192	)	$	(227	)	$	(363	)	$	(473	)

We occupy a

5,000

square-foot facility in Gainesville, Florida under the terms of an operating lease that expires in

February 2021

with the possibility of renewing the lease for

more years. The Gainesville facility is used primarily to support our research and development activities.

We currently occupy a

21,443

square-foot facility in Salt Lake City, Utah under the terms of an operating lease expiring in

March

2024,

with an option to extend for additional

five

years. The facility supports our principal administrative, sales, marketing, customer support, and research and product development activities.

We occupy a

10,700

square-foot warehouse in Shenzhen, China under the terms of an operating lease expiring in

September 2019,

which serves as manufacturing support center for Asia.

We occupy a

7,070

square-foot facility in Austin, Texas - under the terms of an operating lease expiring in

October 2019.

This facility supports our sales, marketing, customer support, and research and development activities.

We occupy a

3,068

square-foot facility in Zaragoza, Spain under the terms of an operating lease expiring in

March 2020.

This office supports our research and development and customer support activities

We occupy a

6,175

square-foot facility in Chennai, India - under the terms of an operating lease expiring in

August 2021.

This facility supports our administrative, marketing, customer support, and research and product development activities.

We occupy a

40,000

square-foot warehouse in Salt Lake City, Utah under the terms of an operating lease expiring in

April 2025,

which serves as our primary inventory fulfillment and repair center.

Supplemental cash flow information related to leases was as follows:

	Six months ended June 30 , 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	356
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$	—

Supplemental balance sheet information related to leases was as follows:

	June 30 , 2019
Operating lease right-of-use assets	$	2,684

Current portion of operating lease liabilities, included in accrued liabilities	$	551
Operating lease liabilities, net of current portion		2,269
Total operating lease liabilities		2,820

Weighted average remaining lease term for operating leases (in years)		4.9
Weighted average discount rate for operating leases		6.1	%

The following represents maturities of operating lease liabilities as of

June 30, 2019:

Years ending December 31,
2019 (Remainder)	$	356
2020		700
2021		646
2022		595
2023		606
Thereafter		375
Total lease payments		3,278
Less: Imputed interest		(458	)
Total	$	2,820

Note 8 - Shareholders' Equity

6 Months Ended

Jun. 30, 2019

Stockholders' Equity Note Disclosure [Text Block]

Shareholders' Equity

	Three months ended June 30,						Six months ended June 30,
	2019			2018			2019			201 8
Common stock and additional paid-in capital
Balance, beginning of period	$	57,940		$	47,620		$	57,857		$	47,472
Share-based compensation expense		55			129			129			266
Proceeds from employee stock purchase plan		7			9			16			20
Balance, end of period	$	58,002		$	47,758			58,002			47,758

Accumulated other comprehensive loss
Balance, beginning of period	$	(137	)	$	(113	)	$	(181	)	$	(65	)
Unrealized gain (loss) on available-for-sale securities, net of tax		84			(1	)		154			(71	)
Foreign currency translation adjustment		9			(60	)		(17	)		(38	)
Balance, end of period	$	(44	)	$	(174	)	$	(44	)	$	(174	)

Retained earnings (accumulated deficit)
Balance, beginning of period	$	(7,824	)	$	9,367		$	(5,475	)	$	9,160
Stock repurchased		—			—			—			(147	)
Cash dividends, $0.07 per share		—			—			—			(583	)
Impact on retained earnings for change in revenue recognition policy		—			—			—			2,782
Net loss		(2,098	)		(2,164	)		(4,447	)		(4,009	)
Balance, end of period	$	(9,922	)	$	7,203		$	(9,922	)	$	7,203

Total shareholders' equity	$	48,036		$	54,787		$	48,036		$	54,787

Note 9 - Share-based Compensation

6 Months Ended

Jun. 30, 2019

Shareholders' Equity and Share-based Payments [Text Block]

Share-based Compensation

Employee Stock Option Plans

The Company’s share-based incentive plans offering stock options are offered under the Company’s

2007

Equity Incentive Plan (the

“2007

Plan”), which was restated and approved by the shareholders on

December 12, 2015.

Provisions of the restated

2007

Plan include the granting of up to

2,000,000

incentive and non-qualified stock options, stock appreciation rights, restricted stock and restricted stock units. Options

may

be granted to employees, officers, non-employee directors and other service providers and

may

be granted upon such terms as the Compensation Committee of the Board of Directors determines in their sole discretion. As of

June 30, 2019,

there were

569,585

options outstanding under the

2007

Plan. As of

June 30, 2019,

the

2007

Plan had

925,509

authorized unissued options.

A summary of the stock option activity under the Company’s plans for the

six

months ended

June 30, 2019

is as follows:

	Number of shares			Weighted average exercise price

Options outstanding at beginning of year		624,256		$	8.87
Granted		—			—
Less:
Exercised		—			—
Forfeited prior to vesting		—			—
Canceled or expired		(54,671	)		9.44
Options outstanding at June 30 , 2019		569,585			8.81
Options exercisable at end of June 30 , 2019		527,352		$	8.63

As of

June 30, 2019,

the total remaining unrecognized compensation cost related to non-vested stock options, net of forfeitures, was approximately

$139,

which will be recognized over a weighted average period of

0.8

year.

Share-based compensation expense has been recorded as follows:

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Cost of goods sold	$	2	$	4	$	4	$	9
Sales and marketing		—		10		1		20
Research and product development		11		27		23		57
General and administrative		42		88		101		180
	$	55	$	129	$	129	$	266

Note 10 - Fair Value Measurements

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Text Block]

10.

Fair Value Measurements

The fair value of the Company’s financial instruments reflects the amounts that the Company estimates it will receive in connection with the sale of an asset or pay in connection with the transfer of a liability in an orderly transaction between market participants at the measurement date (exit price). The fair value hierarchy prioritizes the use of inputs used in valuation techniques into the following

three

levels:

Level

- Quoted prices in active markets for identical assets and liabilities.

Level

- Observable inputs other than quoted prices in active markets for identical assets and liabilities; quoted prices in markets that are

not

active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. This category generally includes U.S. Government and agency securities; municipal securities; mutual funds and securities sold and

not

yet settled.

Level

- Unobservable inputs.

The substantial majority of the Company’s financial instruments are valued using observable inputs. The following table sets forth the fair value of the financial instruments re-measured by the Company as of

June 30, 2019

and

December 31, 2018:

	Level 1		Level 2		Level 3		Total
June 30 , 2019
Corporate bonds and notes	$	—	$	5,845	$	—	$	5,845
Municipal bonds		—		4,101		—		4,101
Total	$	—	$	9,946	$	—	$	9,946
December 31, 2018
Corporate bonds and notes	$	—	$	2,881	$	—	$	2,881
Municipal bonds		—		1,834		—		1,834
Total	$	—	$	4,715	$	—	$	4,715

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Note 11 - Income Taxes	6 Months Ended
Note 11 - Income Taxes	Jun. 30, 2019
Notes to Financial Statements
Income Tax Disclosure [Text Block]	11. Income Taxes The current year loss did not result in income tax benefit due to recording a full valuation allowance against expected benefits. The valuation allowance was recorded as we concluded that it was more likely than not that our deferred tax assets were not realizable primarily due to the Company's recent pre-tax losses. Income tax expense for the three and six months ended 2019 represents income tax expense recorded for jurisdictions outside the United States.

Note 12 - Subsequent Events	6 Months Ended
Note 12 - Subsequent Events	Jun. 30, 2019
Notes to Financial Statements
Subsequent Events [Text Block]	12. Subsequent Events On August 5, 2019, the Honorable Edmond E. Chang of the Northern District of Illinois issued a preliminary injunction order in the ongoing litigation in that district between the Company and Shure Incorporated, Case No. 11 -cv- 3087. In that litigation, ClearOne asserts that Shure’s MXA910 Ceiling Array Microphone, which competes with ClearOne’s beamforming microphone array products, infringes patents related to those products. The August 5 order held that ClearOne had "met its burden of demonstrating entitlement to the extraordinary relief of a preliminary injunction" on U.S. Patent No. 9,813,806. The Court held that "Shure is likely infringing the ’806 Patent and has not raised a substantial question of the patent’s validity.” The injunction order prohibits Shure from “manufacturing, marketing, and selling the MXA910 to be used in its drop-ceiling mounting configuration, including marketing and selling the MXA910 in a way that encourages or allows integrators to install it in a drop-ceiling mounting configuration." .

Significant Accounting Policies (Policies)	6 Months Ended
Significant Accounting Policies (Policies)	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation: The fiscal year for ClearOne is the twelve months ending on December 31. The consolidated financial statements include the accounts of ClearOne and its subsidiaries. All significant inter-company accounts and transactions have been eliminated. These accompanying interim unaudited condensed consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and are not audited. Certain information and footnote disclosures that are usually included in financial statements prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) have been either condensed or omitted in accordance with SEC rules and regulations. The accompanying condensed consolidated financial statements contain all adjustments, consisting of normal recurring accruals, necessary for a fair presentation of our financial position as of June 30, 2019 and December 31, 2018, the results of operations for the three and six months ended June 30, 2019 and 2018, and the cash flows for the six months ended June 30, 2019 and 2018. The results of operations for the three and six months ended June 30, 2019 and 2018 are not necessarily indicative of the results for a full-year period. These interim unaudited condensed consolidated financial statements should be read in conjunction with the financial statements included in our Annual Report on Form 10 -K for the year ended December 31, 2018 filed with the SEC.
New Accounting Pronouncements, Policy [Policy Text Block]	Significant Accounting Policies: The significant accounting policies were described in Note 1 to the audited consolidated financial statements included in the Company’s annual report on Form 10 -K for the year ended December 31, 2018. There have been no changes to these policies during the six months ended June 30, 2019 that are of significance or potential significance to the Company except for the change in accounting for leases as described below. Recent accounting standard related to Leases: In February 2016, the FASB issued ASU 2016 - 02, Leases (“ASU 2016 - 02” ). This new standard establishes a right-of-use (ROU) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. ASU 2016 - 02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In July 2018, the FASB issued ASU No. 2018 - 11 which provides an alternative transition method that allows entities to apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company has adopted the requirements of ASU 2016 - 02 on January 1, 2019, the first day of fiscal year 2019, using the optional transition method. The Company elected to use certain practical expedient options, which allows an entity not to reassess whether any existing or expired contracts contain leases. There was an increase in assets of $2,966 and liabilities of $3,101 due to the recognition of the required right-of-use asset and corresponding liability for all lease obligations that are currently classified as operating leases with the difference of $135 related to existing deferred rent that reduced the ROU asset recorded. The standard did not have a material impact on our condensed consolidated statements of operations and comprehensive loss. Accounting Policy related to Leases: We determine if an arrangement is a lease at inception. Operating leases are included in operating lease - right of use (“ROU”) assets, accrued liabilities, and operating lease liability in our consolidated balance sheets. As of adoption of ASC 842 and as of June 30, 2019 and December 31, 2018, the Company was not party to finance lease arrangements. ROU assets represent our right to use an underlying asset for the lease term and operating lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and operating lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. We use the implicit rate when readily determinable. The operating lease ROU asset also includes any lease payments made and excludes lease incentives. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense is recognized on a straight-line basis over the lease term. Under the available practical expedient, we account for the lease and non-lease components as a single lease component. Other recent accounting pronouncements: The Company has determined that other recently issued accounting standards will either have no material impact on its consolidated financial position, results of operations or cash flows, or will not apply to its operations.

Note 2 - Revenue Information (Tables)

6 Months Ended

Jun. 30, 2019

Disaggregation of Revenue [Table Text Block]

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Audio Conferencing	$	2,889	$	3,593	$	5,600	$	7,252
Microphones		2,230		2,255		4,336		4,565
Video products		1,301		1,123		2,789		2,443
	$	6,420	$	6,971	$	12,725	$	14,260

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
North and South America	$	3,493	$	4,111	$	7,253	$	8,456
Asia (including Middle East) and Australia		1,969		1,861		3,833		3,899
Europe and Africa		958		999		1,639		1,905
	$	6,420	$	6,971	$	12,725	$	14,260

Note 3 - Earnings (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three months ended June 30,						Six months ended June 30,
	201 9			201 8			201 9			201 8
Numerator:
Net loss	$	(2,098	)	$	(2,163	)	$	(4,447	)	$	(4,009	)
Denominator:
Basic weighted average shares outstanding		16,630,770			8,301,094			16,630,684			8,304,093
Dilutive common stock equivalents using treasury stock method		—			—			—			—
Diluted weighted average shares outstanding		16,630,770			8,301,094			16,630,684			8,304,093

Basic loss per common share	$	(0.13	)	$	(0.26	)	$	(0.27	)	$	(0.48	)
Diluted loss per common share	$	(0.13	)	$	(0.26	)	$	(0.27	)	$	(0.48	)

Weighted average options outstanding		569,997			724,373			578,543			736,160
Anti-dilutive options not included in the computations		569,997			724,373			578,543			736,160

Note 4 - Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	Amortized cost		Gross unrealized holding gains		Gross unrealized holding losses			Estimated fair value
June 30 , 2019
Available-for-sale securities:
Corporate bonds and notes	$	5,756	$	96	$	(7	)	$	5,845
Municipal bonds		4,082		20		(1	)		4,101
Total available-for-sale securities	$	9,838	$	116	$	(8	)	$	9,946

December 31, 2018
Available-for-sale securities:
Corporate bonds and notes	$	2,911	$	1	$	(31	)	$	2,881
Municipal bonds		1,849		—		(15	)		1,834
Total available-for-sale securities	$	4,760	$	1	$	(46	)	$	4,715

Available-for-sale Securities, Debt Maturities [Table Text Block]

	Amortized cost		Estimated fair value
Due within one year	$	3,081	$	3,092
Due after one year through five years		6,757		6,854
Due after five years		—		—
Total available-for-sale securities	$	9,838	$	9,946

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

	Less than 12 months					More than 12 months					Total
	Estimated fair value		Gross unrealized holding losses			Estimated fair value		Gross unrealized holding losses			Estimated fair value		Gross unrealized holding losses
As of June 30 , 2019
Corporate bonds and notes	$	293	$	(5	)	$	562	$	(2	)	$	855	$	(7	)
Municipal bonds		—		—			690		(1	)		690		(1	)
Total	$	293	$	(5	)	$	1,252	$	(8	)	$	1,545	$	(8	)

Note 5 - Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2019

Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]

	Estimated useful lives (years)			June 30 , 2019			December 31, 2018
Tradename	5	to	7	$	555		$	555
Patents and technological know-how		10			15,653			13,377
Proprietary software	3	to	15		2,981			2,981
Other	3	to	5		323			323
Total intangible assets					19,512			17,236
Accumulated amortization					(7,641	)		(6,987	)
Total intangible assets, net				$	11,871		$	10,249

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

	Three months ended June 30,						Six months ended June 30,
	2019			2018			2019			2018
Amortization of intangible assets	$	(336	)	$	(265	)	$	(700	)	$	(513	)

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Years ending December 31,	Amount
2019 (Remainder)	$	656
2020		1,175
2021		1,175
2022		1,175
2023		1,168
Thereafter		6,522
Total		11,871

Note 6 - Inventories (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Inventory Current and Noncurrent [Table Text Block]

	June 30 , 2019		December 31, 2018
Current:
Raw materials	$	482	$	1,795
Finished goods		11,776		11,433
	$	12,258	$	13,228

Long-term:
Raw materials	$	2,039	$	2,165
Finished goods		5,676		6,788
	$	7,715	$	8,953

Inventory Write-off [Table Text Block]

	Three months ended June 30,						Six months ended June 30,
	2019			2018			2019			2018
Net loss incurred on valuation of inventory at lower of cost or market value and write-off of obsolete inventory	$	(183	)	$	(170	)	$	(368	)	$	(425	)

Note 7 - Leases and Deferred Rent (Tables)

6 Months Ended

Jun. 30, 2019

Lease, Cost [Table Text Block]

	Three months ended June 30,						Six months ended June 30,
	2019			2018			2019			2018
Rent expense	$	(192	)	$	(227	)	$	(363	)	$	(473	)

	Six months ended June 30 , 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	356
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$	—

	June 30 , 2019
Operating lease right-of-use assets	$	2,684

Current portion of operating lease liabilities, included in accrued liabilities	$	551
Operating lease liabilities, net of current portion		2,269
Total operating lease liabilities		2,820

Weighted average remaining lease term for operating leases (in years)		4.9
Weighted average discount rate for operating leases		6.1	%

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

Years ending December 31,
2019 (Remainder)	$	356
2020		700
2021		646
2022		595
2023		606
Thereafter		375
Total lease payments		3,278
Less: Imputed interest		(458	)
Total	$	2,820

Note 8 - Shareholders' Equity (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Stockholders Equity [Table Text Block]

	Three months ended June 30,						Six months ended June 30,
	2019			2018			2019			201 8
Common stock and additional paid-in capital
Balance, beginning of period	$	57,940		$	47,620		$	57,857		$	47,472
Share-based compensation expense		55			129			129			266
Proceeds from employee stock purchase plan		7			9			16			20
Balance, end of period	$	58,002		$	47,758			58,002			47,758

Accumulated other comprehensive loss
Balance, beginning of period	$	(137	)	$	(113	)	$	(181	)	$	(65	)
Unrealized gain (loss) on available-for-sale securities, net of tax		84			(1	)		154			(71	)
Foreign currency translation adjustment		9			(60	)		(17	)		(38	)
Balance, end of period	$	(44	)	$	(174	)	$	(44	)	$	(174	)

Retained earnings (accumulated deficit)
Balance, beginning of period	$	(7,824	)	$	9,367		$	(5,475	)	$	9,160
Stock repurchased		—			—			—			(147	)
Cash dividends, $0.07 per share		—			—			—			(583	)
Impact on retained earnings for change in revenue recognition policy		—			—			—			2,782
Net loss		(2,098	)		(2,164	)		(4,447	)		(4,009	)
Balance, end of period	$	(9,922	)	$	7,203		$	(9,922	)	$	7,203

Total shareholders' equity	$	48,036		$	54,787		$	48,036		$	54,787

Note 9 - Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement, Option, Activity [Table Text Block]

	Number of shares			Weighted average exercise price

Options outstanding at beginning of year		624,256		$	8.87
Granted		—			—
Less:
Exercised		—			—
Forfeited prior to vesting		—			—
Canceled or expired		(54,671	)		9.44
Options outstanding at June 30 , 2019		569,585			8.81
Options exercisable at end of June 30 , 2019		527,352		$	8.63

Share-based Payment Arrangement, Cost by Plan [Table Text Block]

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Cost of goods sold	$	2	$	4	$	4	$	9
Sales and marketing		—		10		1		20
Research and product development		11		27		23		57
General and administrative		42		88		101		180
	$	55	$	129	$	129	$	266

Note 10 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Level 1		Level 2		Level 3		Total
June 30 , 2019
Corporate bonds and notes	$	—	$	5,845	$	—	$	5,845
Municipal bonds		—		4,101		—		4,101
Total	$	—	$	9,946	$	—	$	9,946
December 31, 2018
Corporate bonds and notes	$	—	$	2,881	$	—	$	2,881
Municipal bonds		—		1,834		—		1,834
Total	$	—	$	4,715	$	—	$	4,715

Note 1 - Business Description, Basis of Presentation and Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Operating Lease, Right-of-Use Asset	$ 2,684	$ 2,966
Operating Lease, Liability, Total	$ 2,820	3,101
Deferred Rent Credit		$ 135,000

Note 2 - Revenue Information - Revenue by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue	$ 6,420	$ 6,971	$ 12,725	$ 14,260
Americas [Member]
Revenue	3,493	4,111	7,253	8,456
Asia Middle East and Australia [Member]
Revenue	1,969	1,861	3,833	3,899
Europe and Africa [Member]
Revenue	958	999	1,639	1,905
Audio Conferencing [Member]
Revenue	2,889	3,593	5,600	7,252
Microphones [Member]
Revenue	2,230	2,255	4,336	4,565
Video Products [Member]
Revenue	$ 1,301	$ 1,123	$ 2,789	$ 2,443

Note 3 - Earnings (Loss) Per Share - Computation of Basic and Diluted Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net loss	$ (2,098)	$ (2,163)	$ (4,447)	$ (4,009)
Basic weighted average shares outstanding (in shares)	16,630,770	8,301,094	16,630,684	8,304,093
Dilutive common stock equivalents using treasury stock method (in shares)
Diluted weighted average shares outstanding (in shares)	16,630,770	8,301,094	16,630,684	8,304,093
Basic loss per common share (in dollars per share)	$ (0.13)	$ (0.26)	$ (0.27)	$ (0.48)
Diluted loss per common share (in dollars per share)	$ (0.13)	$ (0.26)	$ (0.27)	$ (0.48)
Weighted average options outstanding (in shares)	569,997	724,373	578,543	736,160
Anti-dilutive options not included in the computations (in shares)	569,997	724,373	578,543	736,160

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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