Acquisitions - Summary of Gain on Deferred Purchase Price Liability in Settlement of Contingent Arrangement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Due to Skycross			$ 6,349
Less consideration paid		$ (375)
Gain on deferred purchase price		$ 389
Skycross, Inc.
Business Acquisition [Line Items]
Deferred purchase price	$ 1,000
Due to Skycross	126
Due from Skycross	(362)
Less consideration paid	(375)
Gain on deferred purchase price	$ 389