Note 9 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three Months Ended March 31,
	20 20		201 9
Cost of revenues	$	-	$	-
Selling expense		3		-
Engineering and product development expense		10		3
General and administrative expense		174		180
	$	187	$	183

Schedule of Nonvested Share Activity [Table Text Block]

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested shares outstanding, January 1, 2020		165,031		$	6.55
Granted		58,160			3.69
Vested		(44,300	)		5.42
Forfeited		(8,315	)		6.10
Unvested shares outstanding, March 31, 2020		170,576			5.69

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	20 20			201 9
Risk-free interest rate		0.48	%		2.49	%
Dividend yield		0.00	%		0.00	%
Expected common stock market price volatility factor		.43			.41
Weighted average expected life of stock options (years)		6.25			6.25

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

	Number of Shares			Weighted Average Grant Date Fair Value
Options outstanding, January 1, 2020 (87,900 exercisable)		506,810		$	6.89
Granted		66,300			3.69
Exercised		-			-
Forfeited		(24,790	)		6.10
Options outstanding, March 31, 2020 (172,525 exercisable)		548,320			6.54