Revenue - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) segment	Sep. 30, 2018 USD ($)
Revenue From Contract With Customer [Abstract]
Contract acquisition cost recognition, description			most direct contract acquisition costs relate to contracts that are recognized over a period of one year or less.
Contract acquisition, capitalized cost	$ 0		$ 0
Number of reportable segment | segment			2
Contract with customer assets increase (decrease)			$ 4,000,000.0
Decrease in deferred revenue			(16,192,000)	$ (3,054,000)
Deferred revenue increase decrease due to revenue recognized upon customer acceptance			5,000,000.0
Deferred revenue recognized	6,300	$ 5,300	44,200	$ 34,900
Estimated contracted revenue	$ 146,800,000		$ 146,800,000
Revenue, remaining performance obligation, expected timing of satisfaction, Description			Revenue allocated to remaining performance obligations represents estimated contracted revenue that has not yet been recognized which includes unearned revenue and amounts that will be invoiced and recognized as revenue in future periods. Estimated contracted revenue was $146.8 million as of September 30, 2019 of which we expect to recognize approximately 62% over the next 12 months and the remainder thereafter.
Revenue remaining performance obligation percentage of revenue expected to be recognized			62.00%