Revenue, Deferred Revenue and Deferred Costs and Other - Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019
Change in Contract with Customer, Liability [Abstract]
Balance at beginning of period	$ 4,599	$ 2,051
Amounts billed but unrecognized	3,140	1,378
Revenue recognized	(1,640)	(1,309)
Assumed from business combination	0	1,407
Balance at end of period	6,099	3,527
Deferred revenue, current			$ 5,351	$ 3,945
Deferred revenue, noncurrent			748	654
Total deferred revenue	$ 4,599	$ 3,527	$ 6,099	$ 4,599