Note 7. Stock-Based Awards (Tables)

3 Months Ended

Jun. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

	Number of Shares			Exercise Price Range					Weighted Average Exercise Price		Weighted Average Remaining Contractual Life
Outstanding at March 31, 2013		5,780,608		$	0.79	–	$	4.88	$	2.09		6.6
Granted		522,500		$	1.00	–	$	1.09		1.04
Canceled		(226,250	)	$	1.04	–	$	2.78		2.06
Outstanding at June 30, 2013		6,076,858		$	0.85	–	$	4.88	$	2.00		6.5
Vested and expected to vest at June 30, 2013		5,944,245		$	0.85	–	$	4.88	$	2.01		6.5
Exercisable at June 30, 2013		3,928,087		$	0.85	–	$	4.88	$	2.24		5.3

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Number of Shares			Weighted Average Grant Price
Nonvested at March 31, 2013		122,044		$	2.37
Vested		(44,016	)	$	2.30
Nonvested at June 30, 2013		78,028		$	2.41

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

	Three Months Ended June 30,
	2013			2012
Risk-free interest rate		1.29	%		1.13	%
Expected life (in years)		7.02			6.7
Expected volatility		82	%		83	%
Expected dividend yield		--			--

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

	Three Months Ended June 30,
	2013		2012
Cost of sales	$	30	$	47
Selling, general, and administrative expenses		509		369
Research and development expenses		16		27
Total stock-based compensation expense	$	555	$	443