Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three months ended						Six Months Ended
	June 30,						June 30,
	2013			2012			2013			2012
Basic and diluted loss per share:
Net loss	$	(679	)	$	(900	)	$	(2,107	)	$	(2,767	)
Basic and diluted loss per share:
Weighted average shares outstanding		46,230			44,513			45,469			38,067
Basic and diluted net loss per share	$	(0.01	)	$	(0.02	)	$	(0.05	)	$	(0.07	)

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

	Three months ended				Six months ended
	June 30,				June 30,
	2013		2012		2013		2012
Cost of sales	$	1	$	-	$	1	$	-
Research and development		8		6		15		12
Sales and marketing		7		6		15		14
General and administrative		35		34		65		78
Total stock-based compensation	$	51	$	46	$	96	$	104

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

	Six months ended
	June 30,
	2013			2012
Fair value of options issued	$	0.16		$	0.21
Exercise price	$	0.23		$	0.39
Expected life of option (years)	7.4			6.1
Risk-free interest rate		1.30	%		1.48	%
Expected volatility		89.2	%		58.1	%
Dividend yield		0	%		0	%

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

	Options			Weighted Average Exercise Price		Weighted Average Remaining Contractural Term (in Years)
Outstanding as of December 31, 2012		2,184,583		$	2.20
Granted		1,552,500			0.23
Exercised		-			-
Cancelled/forfeited		(309,377	)		0.70
Outstanding as of June 30, 2013		3,427,706		$	1.44		7.6
Exercisable as of June 30, 2013		1,703,690		$	2.55		6.0

Schedule of Product Warranty Liability [Table Text Block]

	Three months ended						Six months ended
	June 30,						June 30,
	2013			2012			2013			2012
Balance at the beginning of the period	$	140		$	110		$	159		$	100
Accruals for warranties issued		23			27			39			58
Settlements made during the period (in cash or in kind)		(13	)		(12	)		(48	)		(33	)
Balance at the end of the period	$	150		$	125		$	150		$	125