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Fair Value Measurements (Tables) | 6 Months Ended
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Sep. 30, 2013
Schedule of Assets and Liabilities Carried at Fair Value | The following table provides the assets carried at fair value, measured as of September 30, 2013 and March 31, 2013 (in thousands):
| Total Carrying Value |  |  | Quoted Prices in Active Markets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
September 30, 2013: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents | $ |  | 15,666 |  |  | $ |  | 15,666 |  |  | $ |  | — |  |  | $ |  | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability | $ |  | 181 |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | 181 |
Warrants | $ |  | 2,626 |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | 2,626 |
| Total Carrying Value |  |  | Quoted Prices in Active Markets (Level 1) |  |  | Using Significant Other Observable Inputs (Level 2) |  |  | Using Significant Unobservable Inputs (Level 3) |
March 31, 2013: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents | $ |  | 18,649 |  |  | $ |  | 18,649 |  |  | $ |  | — |  |  | $ |  | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability | $ |  | 529 |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | 529 |
Warrants | $ |  | 3,633 |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | 3,633 |
Schedule of Liabilities Measured at Fair Value | The table below reflects the activity for the Company’s major classes of liabilities measured at fair value (in thousands).
| Derivative Liability |  |  | Warrants |
--- | --- | --- | --- | --- | ---
April 1, 2013 | $ |  | 529 |  |  | $ |  | 3,633 |
Mark to market adjustment |  | (348 | ) |  |  | (1,007 | )
Balance at September 30, 2013 | $ |  | 181 |  |  | $ |  | 2,626 |
| Derivative Liability |  |  | Warrants |
April 1, 2012 | $ |  | — |  |  | $ |  | — |
Valuation of derivative liability |  | 3,779 |  |  |  | — |
Warrant issuance with Senior Convertible Notes |  | — |  |  |  | 7,018 |
Warrant issuance with Senior Secured Term Loan |  | — |  |  |  | 380 |
Mark to market adjustment |  | (1,016 | ) |  |  | 119 |
Balance at September 30, 2012 |  | 2,763 |  |  |  | 7,517 |
Valuation of derivative liability attributable to modification |  | 542 |  |  |  | — |
Mark to market adjustment |  | (2,776 | ) |  |  | (3,884 | )
Balance at March 31, 2013 | $ |  | 529 |  |  | $ |  | 3,633 |

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- Definition Schedule of liabilities measured at fair value. + References No definition available. + Details
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- Definition Tabular disclosure of the amount of gains or losses for the period included in earnings or resulted in a change to net assets, have arisen from the use of significant unobservable inputs (level 3) to measure the fair value of assets, liabilities, and financial instruments classified in shareholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1),(d) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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