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Note 6 - Indebtedness (Tables) | 6 Months Ended
--- | ---
Sep. 30, 2019
Notes Tables |
Convertible Debt [Table Text Block] |
|  | September 30, 2019 |  |  | March 31, 2019 |
Principal outstanding |  | $ | 172,500 |  |  | $ | -- |
Unamortized debt discount |  |  | (30,476 | ) |  |  | -- |
Unamortized debt issuance costs |  |  | (4,342 | ) |  |  | -- |
Net carrying value |  | $ | 137,682 |  |  | $ | -- |
|  | September 30, 2019 |  |  | March 31, 2019 |
Amount allocated to conversion option |  | $ | 31,073 |  |  | $ | -- |
Less: allocated issuance costs and taxes |  |  | (9,427 | ) |  |  | -- |
Equity component, net |  | $ | 21,646 |  |  | $ | -- |
Interest Expense on Convertible Debt [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Six Months Ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Coupon interest expense at 1.375% |  | $ | 316 |  |  | $ | -- |  |  | $ | 316 |  |  | $ | -- |
Amortization of debt discounts and issuance costs |  |  | 707 |  |  |  | -- |  |  |  | 707 |  |  |  | -- |
Total |  | $ | 1,023 |  |  | $ | -- |  |  | $ | 1,023 |  |  | $ | -- |

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- Definition Tabular disclosure of interest expense on borrowings which can be exchanged for a specified number of another security at the option of the issuer or the holder. + References No definition available. + Details
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- Definition Tabular disclosure of borrowings which can be exchanged for a specified number of another security at the option of the issuer or the holder. Disclosures include, but are not limited to, principal amount, amortized premium or discount, and amount of liability and equity components. + References No definition available. + Details
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