Revenue Recognition - Summary of changes in contact Liabilities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Contract With Customer Asset And Liability [Abstract]
Receipt of the Upfront Payment	$ 100,000
Reclassification to revenue, as the result of performance obligations satisfied	(19,538)
Cash received for cost reimbursement	1,434
Increase in accounts receivable	1,877
Total	$ 83,773