Fair Value of Financial Instruments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) Letter	Dec. 31, 2017 USD ($)
Performance Bond [Abstract]
Unrestricted cash	$ 1,000	$ 2,300
Number of standby letters of credit | Letter	5
Letter of credit and surety bonds	$ 2,300
Assets and liabilities measured at fair value [Abstract]
Money market funds	824	3,240
Foreign exchange contracts - Assets	43	201
Total assets	867	3,441
Liability awards	(118)	(242)
Interest rate swap contract	(103)
Contingent consideration liability		(1,701)
Total liabilities	(221)	(1,943)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Begging balance	1,701
Payments made on contingent liabilities	(1,701)
Change in fair value	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets and liabilities measured at fair value [Abstract]
Money market funds	824	3,240
Foreign exchange contracts - Assets	0	0
Total assets	824	3,240
Liability awards	0	0
Interest rate swap contract	0
Contingent consideration liability		0
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) [Member]
Assets and liabilities measured at fair value [Abstract]
Money market funds	0	0
Foreign exchange contracts - Assets	43	201
Total assets	43	201
Liability awards	(118)	(242)
Interest rate swap contract	(103)
Contingent consideration liability		0
Total liabilities	(221)	(242)
Significant Unobservable Inputs (Level 3) [Member]
Assets and liabilities measured at fair value [Abstract]
Money market funds	0	0
Foreign exchange contracts - Assets	0	0
Total assets	0	0
Liability awards	0	0
Interest rate swap contract	0
Contingent consideration liability		(1,701)
Total liabilities	0	$ (1,701)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Ending balance	$ 0