Revenue - Contract Liabilities (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Change In Contract With Customer, Liability [Roll Forward]
Deferred revenue, beginning of period	$ 397
Revenues recognized from balances held at the beginning of the period	(397)
Revenue deferred from period collections on unfulfilled performance obligations	5,348
Deferred revenue, end of period	$ 5,348