Note 12 - Stock-based Compensation Plan (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	Years Ended December 31,
	2016		2015
Cost of revenues	$	10	$	10
Selling expense		6		5
Engineering and product development expense		11		10
General and administrative expense		242		94
	$	269	$	119

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

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

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

	Number of Shares		Weighted Average Exercise Price
Options outstanding, January 1, 2016		-	$	-
Granted		19,800		4.37
Exercised		-		-
Canceled		-		-
Options outstanding, December 31, 2016 (none exercisable)		19,800		4.37

Schedule of Nonvested Share Activity [Table Text Block]

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested shares outstanding, January 1, 2015		101,875		$	3.66
Granted		-			-
Vested		(33,125	)		3.65
Forfeited		(5,000	)		3.97
Unvested shares outstanding, December 31, 2015		63,750			3.64
Granted		86,400			4.27
Vested		(53,125	)		3.94
Forfeited		-			-
Unvested shares outstanding, December 31, 2016		97,025			4.04