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Long-Term Debt (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 31, 2020 | Jul. 31, 2021 | Jul. 31, 2020 | Jul. 31, 2021 | Jul. 31, 2020 | Jan. 31, 2021 | May 31, 2018
Debt Instrument [Line Items] |  |  |  |  |  |  |
Proceeds from revolving line of credit |  |  |  | $ 0 | $ 19,857,000 |  |
Class of warrant or right, exercise price of warrants or rights (in USD per share) |  |  |  |  |  |  | $ 0.62
Class of warrant or right, outstanding (in shares) |  | 0 |  | 0 |  | 954,884 |
Interest expense, long-term debt |  | $ 500,000 | $ 500,000 | $ 800,000 | $ 800,000 |  |
Class B Common Stock |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Issuance of common stock upon exercise of warrants (in shares) |  | 940,953 |  |  |  |  |
Revolving Credit Facility | Amended Line of Credit |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 45,000,000 |  |  |  |  |  |
Proceeds from revolving line of credit | $ 20,000,000 |  |  |  |  |  |

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