Revenue, Deferred Revenue and Deferred Costs and Other - Accrued Rebates (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Jan. 01, 2019
Change In Accrued Rebate [Roll Forward]
Balance at beginning of period	$ 1,152	$ 609
ASC 606 adoption date impact adjustment	1,730	533
Amount deferred	776	193
Revenue recognized	(198)	(2)
Payments	0	(45)
Balance at end of period	$ 1,730	$ 533
Impact of Adoption | ASC 606
Change In Accrued Rebate [Roll Forward]
ASC 606 adoption date impact adjustment			$ (222)