Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Finance Leases
2021 (remaining three months)	$ 33
2022	14
2023	0
2024	0
2025	0
Thereafter	0
Total lease payments	47
Less amount representing interest	(1)
Present value of lease liabilities	46
Operating Leases
2021 (remaining three months)	1,089
2022	3,547
2023	3,399
2024	3,459
2025	3,563
Thereafter	7,449
Total lease payments	22,506
Less amount representing interest	(3,909)
Total lease liabilities	$ 18,597