Commitments and Contingencies - Components of Operating Lease Expense and Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2020	Sep. 30, 2020
Leases [Abstract]
Operating lease expense	[1]	$ 555	$ 1,717
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases		$ 567	$ 1,753

[1] Amounts have not been reduced by sublease income of $0.1 million and $0.3 million recognized during the three and nine months ended September 30, 2020, respectively.