Note 7 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Notes Tables

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

	Three Months Ended March 31,
	201 7		2016
Cost of revenues	$	3	$	3
Selling expense		-		1
Engineering and product development expense		3		2
General and administrative expense		82		33
	$	88	$	39

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		(20,975	)		4.56
Forfeited		-			-
Unvested shares outstanding, March 31, 2017		131,050			4.92

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		0.39			0.40
Weighted average expected life of stock options (years)		6			4

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

	Number of Shares		Weighted Average Exercise Price
Options outstanding, January 1, 2017 (none exercisable)		19,800	$	4.37
Granted		96,000		6.35
Vested		-		-
Forfeited		-		-
Options outstanding, March 31, 2017 (4,950 exercisable)		115,800		6.01