Note 9 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

Notes Tables

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Cost of revenues	$	1	$	2	$	4	$	5
Selling expense		-		2		-		3
Engineering and product development expense		1		3		4		5
General and administrative expense		96		132		178		165
	$	98	$	139	$	186	$	178

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		55,000			6.35
Vested		(34,725	)		4.55
Forfeited		-			-
Unvested shares outstanding, June 30, 2017		117,300			4.97

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, June 30, 2017 (4,950 exercisable)		115,800		6.01