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Borrowings - 2024 Convertible Notes - Additional Information (Detail) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Mar. 31, 2021 USD ($) | Feb. 28, 2021 USD ($) shares | Aug. 31, 2020 $ / shares | Aug. 31, 2019 | Mar. 31, 2021
Debt Instrument [Line Items] |  |  |  |  |
Debt issuance amount | $ | $ 230.0 |  |  |  |
2024 Convertible Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior notes, effective interest rate |  |  |  | 5.75% |
Maturity date |  |  |  | 2024-11 |
Debt instrument payment term description |  |  |  |  | The 2024 convertible notes accrued interest at the rate of 5.75% per year on the principal amount, payable semiannually in arrears on February 15 and August 15 of each year, beginning February 15, 2020, with interest accruing from August 6, 2019. Interest on the 2024 convertible notes was payable in cash or, at the option of the Company if certain conditions are met, in shares of the Company’s common stock at a price per share equal to the last reported sale price on the trading day immediately prior to the interest payment date.
No of convertible shares |  |  | 333.3333 |  |
Principal amount per share | $ / shares |  |  | $ 1,000 |  |
Conversion price | $ / shares |  |  | $ 3.00 |  |
Debt issuance amount | $ |  | $ 5.0 |  |  |
Conversion of notes to common shares | shares |  | 1,666,667 |  |  |

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