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Stockholders' Equity (Tables) | 12 Months Ended
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Mar. 31, 2015
Stockholders Equity Note [Abstract] |
Components of Employee Stock-Based Compensation | The components of employee stock-based compensation for the years ended March 31, 2015, 2014 and 2013 were as follows (in thousands):
| For the Years Ended March 31, |
| 2015 |  |  | 2014 |  |  | 2013 |
Stock options | $ | 1,851 |  |  | $ | 2,730 |  |  | $ | 3,389 |
Restricted stock and stock awards |  | 4,063 |  |  |  | 7,936 |  |  |  | 4,698 |
Employee stock purchase plan |  | 22 |  |  |  | 30 |  |  |  | 51 |
Total stock-based compensation expense | $ | 5,936 |  |  | $ | 10,696 |  |  | $ | 8,138 |
Summary of Stock-Based Compensation Expense | The following table summarizes employee stock-based compensation expense by financial statement line item for the years ended March 31, 2015, 2014 and 2013 (in thousands):
| 2015 |  |  | 2014 |  |  | 2013 |
Cost of revenues | $ | 719 |  |  | $ | 1,002 |  |  | $ | 726 |
Research and development |  | 1,728 |  |  |  | 2,751 |  |  |  | 2,456 |
Selling, general and administrative |  | 3,489 |  |  |  | 6,943 |  |  |  | 4,956 |
Total | $ | 5,936 |  |  | $ | 10,696 |  |  | $ | 8,138 |
Summary of Employee and Non-Employee Stock Options Activity | The following table summarizes the information concerning currently outstanding and exercisable employee and non-employee options:
|  |  |  |  |  |  |  |  | Weighted- |  |  |  |  |
|  |  |  |  | Weighted- |  |  | Average |  |  |  |  |
|  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |
| Options/ |  |  | Exercise |  |  | Contractual |  |  | Intrinsic Value |
| Shares |  |  | Price |  |  | Term |  |  | (thousands) |
Outstanding at March 31, 2014 |  | 294,184 |  |  | $ | 109.31 |  |  |  |  |  |  |  |  |
Granted |  | 100,000 |  |  |  | 14.30 |  |  |  |  |  |  |  |  |
Exercised |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Cancelled/forfeited |  | (13,244 | ) |  |  | 103.51 |  |  |  |  |  |  |  |  |
Outstanding at March 31, 2015 |  | 380,940 |  |  | $ | 84.57 |  |  |  | 6.6 |  |  | $ | - |
Exercisable at March 31, 2015 |  | 210,869 |  |  | $ | 135.95 |  |  |  | 5.0 |  |  | $ | - |
Fully vested and expected to vest at March 31, 2015 |  | 363,021 |  |  | $ | 87.94 |  |  |  | 6.5 |  |  | $ | - |
Schedule of Weighted Average Assumptions used in Black-Scholes Valuation Model for Stock Options Granted | The weighted average assumptions used in the Black-Scholes valuation model for stock options granted during the years ended March 31, 2015, 2014, and 2013 are as follows:
| For the Years Ended March 31, |
| 2015 |  |  | 2014 |  |  | 2013 |
Expected volatility |  | 85.5 | % |  |  | 75.1 | % |  |  | 72.0 | %
Risk-free interest rate |  | 1.9 | % |  |  | 1.7 | % |  |  | 0.9 | %
Expected life (years) |  | 5.8 |  |  |  | 5.9 |  |  |  | 5.9 |
Dividend yield | None |  |  | None |  |  | None |
Summary of the Employee and Non-Employee Restricted Stock Activity | The following table summarizes the employee and non-employee restricted stock activity for the year ended March 31, 2015:
|  |  |  |  | Weighted |  |  | Intrinsic |
|  |  |  |  | Average |  |  | Aggregate |
|  |  |  |  | Grant Date |  |  | Value |
| Shares |  |  | Fair Value |  |  | (thousands) |
Outstanding at March 31, 2014 |  | 241,536 |  |  | $ | 33.43 |  |  |  |  |
Granted |  | 332,782 |  |  |  | 16.68 |  |  |  |  |
Vested |  | (210,942 | ) |  |  | 29.09 |  |  |  |  |
Forfeited |  | (22,788 | ) |  |  | 18.91 |  |  |  |  |
Outstanding at March 31, 2015 |  | 340,588 |  |  | $ | 20.82 |  |  | $ | 2,193 |

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- 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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