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Stockholders' Equity (Tables) | 12 Months Ended
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Mar. 31, 2017
Equity [Abstract] |
Components of Employee Stock-Based Compensation | The components of employee stock-based compensation for the years ended March 31, 2017, 2016 and 2015 were as follows (in thousands):
| Fiscal years ended March 31,
| 2017 |  | 2016 |  | 2015
Stock options | $ | 323 |  |  | $ | 663 |  |  | $ | 1,851 |
Restricted stock and stock awards | 2,569 |  |  | 2,574 |  |  | 4,063 |
Employee stock purchase plan | — |  |  | 11 |  |  | 22 |
Total stock-based compensation expense | $ | 2,892 |  |  | $ | 3,248 |  |  | $ | 5,936 |
Summary of Stock-Based Compensation Expense | The following table summarizes employee stock-based compensation expense by financial statement line item for the fiscal years ended March 31, 2017, 2016 and 2015 (in thousands):
| Fiscal years ended March 31,
| 2017 |  | 2016 |  | 2015
Cost of revenues | $ | 185 |  |  | $ | 274 |  |  | $ | 719 |
Research and development | 214 |  |  | 418 |  |  | 1,728 |
Selling, general and administrative | 2,493 |  |  | 2,556 |  |  | 3,489 |
Total | $ | 2,892 |  |  | $ | 3,248 |  |  | $ | 5,936 |
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:
| Options / Shares |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term |  | Aggregate Intrinsic Value (thousands)
Outstanding at March 31, 2016 | 366,549 |  |  | $ | 83.39 |  |  |  |  |  |
Granted | 9,703 |  |  | 6.80 |  |  |  |  |  |
Exercised | — |  |  | — |  |  |  |  |  |
Canceled/forfeited | (24,244 | ) |  | 107.26 |  |  |  |  |  |
Outstanding at March 31, 2017 | 352,008 |  |  | $ | 79.63 |  |  | 5.1 |  | $ | 0.6 |
Exercisable at March 31, 2017 | 282,005 |  |  | $ | 96.09 |  |  | 5.0 |  | $ | — |
Fully vested and expected to vest at March 31, 2017 | 347,256 |  |  | $ | 80.54 |  |  | 4.5 |  | $ | 0.5 |
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 fiscal years ended March 31, 2017, 2016, and 2015 are as follows:
| Fiscal years ended March 31,
| 2017 |  | 2016 |  | 2015
Expected volatility | 67.6 | % |  | N/A |  | 85.5 | %
Risk-free interest rate | 1.3 | % |  | N/A |  | 1.9 | %
Expected life (years) | 5.7 |  |  | N/A |  | 5.9 |
Dividend yield | None |  |  | N/A |  | 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, 2017:
| Shares |  | Weighted Average Grant Date Fair Value |  | Intrinsic Aggregate Value (thousands)
Outstanding at March 31, 2016 | 482,844 |  |  | $ | 9.62 |  |  |  |
Granted | 171,000 |  |  | 10.23 |  |  |  |
Vested | (228,919 | ) |  | 10.51 |  |  |
Forfeited | — |  |  | — |  |  |  |
Outstanding at March 31, 2017 | 424,925 |  |  | $ | 9.40 |  |  | $ | 2,915 |

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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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