Long-term Debt - Additional Information (Details) - Revolving Credit Facility - Line of Credit - USD ($) |
Aug. 07, 2019 |
Dec. 31, 2020 |
|---|---|---|
| Debt Instrument [Line Items] | ||
| Maximum borrowing capacity | $ 12,000,000.0 | |
| Debt instrument, term | 2 years | |
| Cash liquidity | $ 20,000,000.0 | |
| Liquidity coverage ratio | 225.00% | |
| Amount outstanding | $ 0 | |
| Remaining borrowing capacity | $ 8,200,000 | |
| Prime Rate | Minimum | ||
| Debt Instrument [Line Items] | ||
| Interest rate over variable rate when liquidity coverage ratio exceeds 2.75 | 0.50% | |
| Prime Rate | Maximum | ||
| Debt Instrument [Line Items] | ||
| Interest rate over variable rate when liquidity coverage ratio exceeds 2.75 | 5.50% |