Revenue - Summary of Activity Impacting Contract Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Contract Liabilities [Rollforward]
Balance beginning of period	$ 5,197	$ 0
Contract liabilities transferred to deferred revenue	(2,538)	(1,257)
Addition to contract liabilities	3,671	3,375
Balance end of period	6,330	4,208
ASC 606
Contract Liabilities [Rollforward]
Adoption of ASC 606	$ 0	$ 2,090