Note 2 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2013

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

	Three months ended March 31,
	2013			2012
Basic and diluted loss per share:
Net loss	$	(1,428	)	$	(1,867	)
Basic and diluted loss per share:
Weighted average shares outstanding		44,699			31,621
Basic and diluted net loss per share	$	(0.03	)	$	(0.06	)

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

	Three months ended March 31,
	2013		2012
Research and development	$	7	$	6
Sales and marketing		8		8
General and administrative		30		44
Total stock-based compensation	$	45	$	58

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

	Three months ended March 31,
	2013			2012
Fair value of options issued	$	0.15		$	0.21
Exercise price	$	0.23		$	0.39
Expected life of option (years)	8.3			6.1
Risk-free interest rate		1.57	%		1.48	%
Expected volatility		83.82	%		58.05	%
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		1,052,500		$	0.23
Exercised		-		$	-
Cancelled/forfeited		(25,200	)	$	2.65
Outstanding as of March 31, 2013		3,211,883		$	1.55		7.6
Exercisable as of March 31, 2013		1,565,450		$	2.74		5.9

Schedule of Product Warranty Liability [Table Text Block]

	Three months ended March 31,
	2013			2012
Balance at the beginning of the period	$	159		$	100
Accruals for warranties issued		16			31
Settlements made during the period (in cash or in kind)		(35	)		(21	)
Balance at the end of the period	$	140		$	110