Note 12 - Stock-based Compensation Plan (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

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

	Number of Shares			Weighted Average Exercise Price
Options outstanding, January 1, 2014 (10,000 exercisable)		10,000		$	5.66
Granted		-			-
Exercised		-			-
Canceled		(10,000	)		5.66
Options outstanding, December 31, 2014		-			-

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

	Years Ended December 31,
	2015		2014
Cost of revenues	$	10	$	11
Selling expense		5		6
Engineering and product development expense		10		16
General and administrative expense		94		101
	$	119	$	134

Schedule of Nonvested Share Activity [Table Text Block]

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested shares outstanding, January 1, 2014		180,000		$	3.02
Granted		10,000			4.14
Vested		(83,125	)		2.31
Forfeited		(5,000	)		3.97
Unvested shares outstanding, December 31, 2014		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