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Note 6 - Indebtedness (Tables) | 3 Months Ended
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Jun. 30, 2021
Notes Tables |
Convertible Debt [Table Text Block] |
|  | June 30, 2021 |  |  | March 31, 2021 |
Principal outstanding |  | $ | 172,500 |  |  | $ | 172,500 |
Unamortized debt discount attributable to equity |  |  | - |  |  |  | (23,497 | )
Unamortized debt issuance costs |  |  | (3,805 | ) |  |  | (3,328 | )
Net carrying value |  | $ | 168,695 |  |  | $ | 145,675 |
Interest Expense on Convertible Debt [Table Text Block] |
|  | Three Months Ended June 30, |
|  | 2021 |  |  | 2020 |
Coupon interest expense at 1.375% |  | $ | 593 |  |  | $ | 593 |
Amortization of debt discounts and issuance costs |  |  | 221 |  |  |  | 1,326 |
Total |  | $ | 814 |  |  | $ | 1,919 |

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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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