|
Stockholders' Equity (Tables)
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12 Months Ended |
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Mar. 31, 2013
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| Stockholders' Equity |
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| 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 for the years ended March 31, 2013, 2012 and 2011 (in thousands):
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Fiscal Year Ended March 31, |
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2013 |
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2012 |
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2011 |
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Cost of goods sold
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|
$ |
92 |
|
$ |
136 |
|
$ |
209 |
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Research and development
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|
|
319 |
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|
324 |
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211 |
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Selling, general and administrative
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1,190 |
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1,192 |
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1,998 |
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| |
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Stock-based compensation expense
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$ |
1,601 |
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$ |
1,652 |
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$ |
2,418 |
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| Schedule of weighted-average assumptions used to calculate the estimated fair value of each stock option |
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Shares |
|
Weighted-
Average
Exercise Price |
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Weighted-
Average
Remaining
Contractual
Term |
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Aggregate
Intrinsic
Value |
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(in years)
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Options outstanding at March 31, 2012
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10,039,651 |
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$ |
1.41 |
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Granted
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1,958,330 |
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$ |
1.01 |
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Exercised
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— |
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— |
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Forfeited, cancelled or expired
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(206,216 |
) |
$ |
2.16 |
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| |
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Options outstanding at March 31, 2013
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11,791,765 |
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$ |
1.33 |
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|
5.6 |
|
$ |
157,050 |
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Options fully vested at March 31, 2013 and those expected to vest beyond March 31, 2013
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11,560,603 |
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$ |
1.34 |
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5.5 |
|
$ |
157,048 |
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Options exercisable at March 31, 2013
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9,024,229 |
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$ |
1.39 |
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4.6 |
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$ |
155,696 |
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| Summary of stock option activity |
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Fiscal Year Ended
March 31, |
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2013 |
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2012 |
|
2011 |
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Risk-free interest rates
|
|
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0.8 |
% |
|
1.9 |
% |
|
3.1 |
% |
|
Expected lives (in years)
|
|
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5.7 |
|
|
5.0 |
|
|
5.0 |
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Dividend yield
|
|
|
— |
% |
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— |
% |
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— |
% |
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Expected volatility
|
|
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79.8 |
% |
|
89.0 |
% |
|
97.9 |
% |
|
Weighted average grant date fair value of options granted during the period
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$ |
0.67 |
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$ |
1.19 |
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$ |
1.02 |
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| Summary of restricted stock unit activity |
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Restricted Stock Units
|
|
Shares |
|
Weighted
Average Grant
Date Fair
Value |
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Nonvested restricted stock units outstanding at March 31, 2012
|
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1,143,262 |
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$ |
1.20 |
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Granted
|
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919,414 |
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$ |
1.00 |
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Vested and issued
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(469,911 |
) |
$ |
1.15 |
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Forfeited
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(125,669 |
) |
$ |
1.05 |
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| |
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Nonvested restricted stock units outstanding at March 31, 2013
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1,467,096 |
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$ |
1.10 |
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Restricted stock units expected to vest beyond March 31, 2013
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1,358,386 |
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$ |
1.10 |
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| Schedule of warrant activity |
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March
2012
Shares |
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September
2009
Shares |
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May
2009
Shares |
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September
2008
Shares |
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January
2007
Shares |
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Balance, March 31, 2010
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— |
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5,780,347 |
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3,612,717 |
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7,686,795 |
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17,003,898 |
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Issuance of warrants
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— |
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— |
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— |
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48,042 |
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— |
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Warrants exercised
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— |
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— |
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(3,612,717 |
) |
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(392,190 |
) |
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(8,468,324 |
) |
| |
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Balance, March 31, 2011
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— |
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5,780,347 |
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— |
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7,342,647 |
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8,535,574 |
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Issuance of warrants
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22,550,000 |
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— |
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— |
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— |
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— |
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Warrants exercised
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— |
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(5,780,347 |
) |
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— |
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(3,579,239 |
) |
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(7,298,234 |
) |
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Anti-dilution provision
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— |
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— |
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— |
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146,626 |
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— |
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Warrants expired
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— |
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— |
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— |
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— |
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(1,237,340 |
) |
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Balance, March 31, 2012
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22,550,000 |
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|
— |
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— |
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3,910,034 |
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— |
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Anti-dilution provision
|
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— |
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— |
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— |
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51,437 |
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| |
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Balance, March 31, 2013
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22,550,000 |
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|
— |
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— |
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3,961,471 |
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— |
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