Leases - Balance Sheet Classification and Other Information (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Balance Sheet Classification [Abstract]
Long-term lease liabilities	$ 3,635	$ 3,927
Total operating lease liabilities	$ 6,728
Other Information [Abstract]
Weighted-average remaining term for operating leases	4 years 3 months 21 days
Weighted-average discount rate for operating leases	8.22%
Accounts Payable and Accrued Liabilities [Member]
Balance Sheet Classification [Abstract]
Current lease liabilities (recorded in Accrued expenses and other current liabilities)	$ 3,093