Note 9 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Cost of revenues	$	1	$	2	$	5	$	7
Selling expense		-		1		-		4
Engineering and product development expense		1		3		5		8
General and administrative expense		104		38		282		203
	$	106	$	44	$	292	$	222

Schedule of Nonvested Share Activity [Table Text Block]

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested shares outstanding, January 1, 2017		97,025		$	4.04
Granted		64,000			6.48
Vested		(45,975	)		4.70
Forfeited		-			-
Unvested shares outstanding, September 30, 2017		115,050			5.13

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

	2017			2016
Risk-free interest rate		2.14	%		1.30	%
Dividend yield		0.00	%		0.00	%
Expected common stock market price volatility factor		.39			.40
Weighted average expected life of stock options (years)		6			4

Share-based Compensation, Stock Options, Activity [Table Text Block]

	Number of Shares		Weighted Average Grant Date Fair Value
Options outstanding, January 1, 2017 (none exercisable)		19,800	$	4.37
Granted		96,000		6.35
Exercised		-		-
Forfeited		-		-
Options outstanding, September 30, 2017 (4,950 exercisable)		115,800		6.01