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Borrowing - Narrative (Details) - Term Loan - USD ($) | Jun. 30, 2021 | Oct. 09, 2020 | Jul. 31, 2021 | May 16, 2018
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Term loan face amount |  |  |  | $ 50,000,000.0
Interest-only payment extension term (in months) |  | 12 months |  |
Closing fee (percent) |  |  |  | 1.00%
Closing fee |  | $ 100,000 |  | $ 500,000
Final fee due upon maturity, acceleration, prepayment, or termination (percent) | 4.95% |  |  |
Additional default interest rate | 4.00% |  |  |
Subsequent event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Closing fee |  |  | $ 100,000 |
Prior to first anniversary of closing date |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Prepayment premium (as a percent) | 3.00% |  |  |
After first anniversary through second anniversary of closing date |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Prepayment premium (as a percent) | 2.00% |  |  |
After second anniversary to maturity date |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Prepayment premium (as a percent) | 1.00% |  |  |

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