Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Assets and liabilities measured at fair value [Abstract]
Money market fund	$ 9,626	$ 8,979
Foreign exchange contracts - Assets	23	121
Total assets	9,649	9,100
Foreign exchange contracts - Liabilities	136	57
Contingent consideration liability	2,466	3,732
Total liabilities	2,602	3,789
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance at December 31, 2015	3,732
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	1,421
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(155)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease), Total	(1,266)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value, Ending Balance	2,466
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets and liabilities measured at fair value [Abstract]
Money market fund	9,626	8,979
Foreign exchange contracts - Assets	0	0
Total assets	9,626	8,979
Foreign exchange contracts - Liabilities	0	0
Contingent consideration liability	0	0
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) [Member]
Assets and liabilities measured at fair value [Abstract]
Money market fund	0	0
Foreign exchange contracts - Assets	23	121
Total assets	23	121
Foreign exchange contracts - Liabilities	136	57
Contingent consideration liability	0	0
Total liabilities	136	57
Significant Unobservable Inputs (Level 3) [Member]
Assets and liabilities measured at fair value [Abstract]
Money market fund	0	0
Foreign exchange contracts - Assets	0	0
Total assets	0	0
Foreign exchange contracts - Liabilities	0	0
Contingent consideration liability	2,466	3,732
Total liabilities	$ 2,466	$ 3,732