Note 8 - Long Term Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2012

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

	2012			2011
Expected volatility		71.46	%		70.26	%
Risk-free interest rate		0.58	%		1.36	%
Expected dividend yield		0.00	%		0.00	%
Expected life (in years)		6.00			6.00
Estimated fair value per option granted	$	0.67		$	1.04

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

	Number of options			Weighted average exercise price		Weighted average remaining contractual life (years)		Aggregate intrinsic value
Outstanding at January 1, 2012		3,224,879		$	2.34
Granted		1,576,574			1.45
Exercised		(1,667	)		0.86
Forfeited and cancelled		(505,513	)		1.75
Outstanding at December 31, 2012		4,294,273			2.07		4.70	$	19,266
Exercisable at December 31, 2012		2,551,124			2.51		4.53	$	2,610

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

	Shares			Weighted average grant date fair value
Nonvested at January 1, 2012		528,443		$	2.00
Granted		152,328			1.37
Vested		(327,216	)		1.96
Forfeited and cancelled		(10,394	)		2.21
Nonvested at December 31, 2012		343,161			1.76

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

	2012		2011
Cost of sales	$	75	$	101
Research and development		323		360
Selling, general and administrative		540		544
	$	938	$	1,005