Acquisitions - Schedule of Contingent Consideration (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
2019	$ 3,500
2020	4,000
Total	7,500
Beginning Liability	677
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	(50)
Contingent Consideration Foreign Currency Translation	0
Ending Liability	627
Business Acquisition Contingent Consideration Accounts Payable	600	$ 600
IC Axon
Business Acquisition [Line Items]
2019	3,500
2020	0
Total	3,500
Beginning Liability	594
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	(14)
Contingent Consideration Foreign Currency Translation	0
Ending Liability	580
McKinney Rogers
Business Acquisition [Line Items]
2019	0
2020	4,000
Total	4,000
Beginning Liability	83
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	(36)
Contingent Consideration Foreign Currency Translation	0
Ending Liability	47
Minimum | IC Axon
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	0
Minimum | McKinney Rogers
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	0
Maximum | IC Axon
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	3,500
Maximum | McKinney Rogers
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	$ 18,000