Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Assets and liabilities measured at fair value [Abstract]
Money market funds	$ 11,219	$ 8,979
Foreign exchange contracts - Assets		121
Total assets	11,219	9,100
Foreign exchange contracts - Liabilities	(230)	(57)
Contingent consideration liability	(1,941)	(3,732)
Total liabilities	(2,171)	(3,789)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance at January 1, 2016	3,732
Payments made on contingent liabilities	1,421
Change in fair value	370
Ending balance	1,941
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets and liabilities measured at fair value [Abstract]
Money market funds	11,219	8,979
Foreign exchange contracts - Assets		0
Total assets	11,219	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 funds	0	0
Foreign exchange contracts - Assets		121
Total assets	0	121
Foreign exchange contracts - Liabilities	(230)	(57)
Contingent consideration liability	0	0
Total liabilities	(230)	(57)
Significant Unobservable Inputs (Level 3) [Member]
Assets and liabilities measured at fair value [Abstract]
Money market funds	0	0
Foreign exchange contracts - Assets		0
Total assets	0	0
Foreign exchange contracts - Liabilities	0	0
Contingent consideration liability	(1,941)	(3,732)
Total liabilities	$ (1,941)	$ (3,732)