Acquisition - Narrative (Details) $ in Thousands, $ in Thousands				12 Months Ended
	Jun. 08, 2018 USD ($)	Aug. 03, 2015 USD ($)	Aug. 03, 2015 AUD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Acquisition
Contingent consideration on acquisition	$ 1,500			$ 1,500
SlimCut
Acquisition
Payments to acquire business	5,458
Eligible future cash payments based on certain financial milestones (maximum)	1,500
Contingent consideration on acquisition	$ 1,443			1,500
Mark-to-market expense				$ 57
TVN
Acquisition
Payments to acquire business		$ 2,217	$ 3,040
Period following closing date during which additional payments may be required		2 years	2 years
Mark-to-market expense					$ 148
Compensation related expense					$ 1,810