Note 7. Stock-Based Awards (Tables)

6 Months Ended

Sep. 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		721,000		$	0.90	–		$	1.09		1.03
Exercised		-					-				-
Canceled (1)		(1,994,833	)	$	0.97	–		$	3.62		2.24
Outstanding at September 30, 2013		4,506,775		$	0.85	–		$	4.88	$	1.85		6.1
Vested and expected to vest at September 30, 2013		4,439,571		$	0.85	–		$	4.88	$	1.85		6.1
Exercisable at September 30, 2013		3,466,004		$	0.85	–		$	4.88	$	1.96		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
Granted		165,000			0.95
Vested		(79,142	)		2.16
Forfeited		-			-
Nonvested at September 30, 2013		207,902		$	1.32

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

	Three Months Ended September 30,						Six Months Ended September 30,
	2013			2012			2013			2012
Risk-free interest rate		1.38	%		1.02	%		1.16	%		1.03	%
Expected life (in years)		5.1			6.4			5.5			6.4
Expected volatility		75	%		85	%		80	%		84	%
Expected dividend yield		--			--			--			--

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

	Three Months Ended September 30,					Six Months Ended September 30,
	2013			2012		2013		2012
Cost of sales	$	12		$	22	$	42	$	69
Selling, general, and administrative expenses (1)		(244	)		538		265		907
Research and development expenses		5			9		21		36
Total stock-based compensation expense	$	(227	)	$	569	$	328	$	1,012