Fair Value Measurement (Details 2) - Contingent consideration obligation - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reconciliation of the beginning and ending balances for the liabilities measured at fair value using significant unobservable inputs (Level 3)
Balance at the beginning of the period			$ (272)
Payments			57
Change in fair value	$ 3	$ (6)	(9)	$ (663)
Balance at the end of the period	$ (224)		$ (224)