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

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

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

	Three months ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Basic and diluted loss per share:
Net loss	$	(1,651	)	$	(928	)	$	(3,758	)	$	(3,695	)
Basic and diluted loss per share:
Weighted average shares outstanding		49,158			44,542			46,712			40,241
Basic and diluted net loss per share	$	(0.03	)	$	(0.02	)	$	(0.08	)	$	(0.09	)

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

	Three months ended September 30,				Nine months ended September 30,
	2013		2012		2013		2012
Cost of sales	$	1	$	-	$	2	$	-
Research and development		11		7		26		19
Sales and marketing		8		6		23		20
General and administrative		33		29		98		107
Total stock-based compensation	$	53	$	42	$	149	$	146

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

	Nine months ended September 30,
	2013			2012
Fair value of options issued	$	0.17		$	0.15
Exercise price	$	0.25		$	0.27
Expected life of option (years)		7.2			5.6
Risk-free interest rate		1.3	%		0.8	%
Expected volatility		90.2	%		59.0	%
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		1,684,500			0.25
Exercised		-			-
Cancelled/forfeited		(651,377	)		0.52
Outstanding as of September 30, 2013		3,217,706		$	1.52		7.3
Exercisable as of September 30, 2013		1,875,274		$	2.35		6.0

Schedule of Product Warranty Liability [Table Text Block]

	Three months ended September 30,						Nine months ended September 30,
	2013			2012			2013			2012
Balance at the beginning of the period	$	150		$	125		$	159		$	100
Accruals for warranties issued		7			52			46			110
Settlements made during the period (in cash or in kind)		(17	)		(18	)		(65	)		(51	)
Balance at the end of the period	$	140		$	159		$	140		$	159