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Fair Value Measurements - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018 | Sep. 28, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Convertible notes, net of debt issuance costs and discounts of $0 and $1,827, respectively | $ 18,505,000 | $ 0 |  |
Change in fair value of convertible note embedded derivative liability | $ 0 | $ (1,008,000) | $ (7,559,000) |
Stock price (in dollars per share) | $ 4.18 | $ 3.50 | $ 2.01 |
Loss on extinguishment of debt | $ 0 | $ (431,000) | $ (1,785,000) |
Change in fair value of convertible note embedded derivative liability | $ 9,580,000 | 4,875,000 | 3,208,000 |
Convertible Notes Payable |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Debt discount |  | 0 |  | $ 4,916,000
Debt face amount |  |  |  | $ 16,000,000
Interest rate |  |  |  | 8.75%
Issuance of common stock related to debt |  | 5,700,000 | $ 10,300,000 |
Convertible notes, net of debt issuance costs and discounts of $0 and $1,827, respectively |  | 0 |  |
Debt issuance costs |  | $ 0 |  |

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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 + Details
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