Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

Stock-Based Compensation (Tables)

9 Months Ended

Dec. 31, 2012

Summary of stock-based compensation expense by statement of operations line item

The following table summarizes, by statement of operations line item, stock-based compensation expense (in thousands):

	Three Months Ended December 31,				Nine Months Ended December 31,
	2012		2011		2012		2011
Cost of goods sold	$	23	$	27	$	76	$	104
Research and development	91		78		240		249
Selling, general and administrative	367		299		861		913
Stock-based compensation expense	$	481	$	404	$	1,177	$	1,266

Schedule of weighted-average assumptions used to calculate the estimated fair value of each stock option

	Three Months Ended December 31,				Nine Months Ended December 31,
	2012		2011		2012		2011
Risk-free interest rates	—	%	—	%	0.8	%	1.9	%
Expected lives (in years)	—		—		5.7		5.0
Dividend yield	—	%	—	%	—	%	—	%
Expected volatility	—	%	—	%	79.8	%	89.0	%

Summary of stock option activity

	Shares		Weighted Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Options outstanding at March 31, 2012	10,039,651		$	1.41
Granted	1,958,330		1.01
Exercised	—		—
Forfeited, cancelled or expired	(206,216	)	2.16
Options outstanding at December 31, 2012	11,791,765		$	1.33	5.83	$	132,100

Options fully vested at December 31, 2012 and those expected to vest beyond December 31, 2012	11,541,459		$	1.34	5.75	$	132,096

Options exercisable at December 31, 2012	8,868,399		$	1.40	4.77	$	127,225

Summary of restricted stock unit activity

	Shares		Weighted Average Grant-Date Fair Value
Unvested restricted stock units outstanding at March 31, 2012	1,143,262		$	1.20

Granted	860,794		1.01
Vested and issued	(443,040	)	1.15
Forfeited	(103,805	)	1.05

Unvested restricted stock units outstanding at December 31, 2012	1,457,211		$	1.11
Restricted stock units expected to vest beyond December 31, 2012	1,333,516		$	1.11

- Definition

Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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