Acquisitions (Details 2) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Business Acquisition [Line Items]
Total net revenue	$ 53,071	$ 41,111	$ 104,409	$ 78,165
Net income (loss)	$ (7,290)	$ 3,428	$ (13,278)	$ 1,704
Basic net income (loss) per common share	$ (0.12)	$ 0.06	$ (0.22)	$ 0.03
Diluted net income (loss) per common share	$ (0.12)	$ 0.06	$ (0.22)	$ 0.03
Uptivity
Business Acquisition [Line Items]
Total net revenue	$ 5,200		$ 9,900
Net income (loss)	(1,800)		(4,800)
Net revenue, Pro forma	53,071	$ 42,982	104,409	$ 85,298
Net income (loss), Pro forma	$ (5,865)	$ (5,458)	$ (11,468)	$ (8,485)
Basic net income (loss) per common share, Pro forma	$ (0.10)	$ (0.09)	$ (0.19)	$ (0.15)
Diluted net income (loss) per common share, Pro forma		$ (0.09)		$ (0.15)
As Reported | Uptivity
Business Acquisition [Line Items]
Total net revenue	$ 53,071	$ 41,111	$ 104,409	$ 78,165
Net income (loss)	$ (7,290)	$ 3,428	$ (13,278)	$ 1,704
Basic and diluted net income (loss) per common share	$ (0.12)		$ (0.22)
Basic net income (loss) per common share		$ 0.06		$ 0.03
Diluted net income (loss) per common share		$ 0.06		$ 0.03