Selected Balance Sheet Accounts (Details 1) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Intangible Assets
Intangible assets, gross	$ 24,862	$ 14,468
Accumulated amortization	(11,193)	(10,295)
Intangible assets, net	13,669	4,173
Trademarks and Trade Names [Member]
Intangible Assets
Intangible assets, gross	8,894	6,574
Accumulated amortization	(5,794)	(5,594)
Intangible assets, net	$ 3,100	980
Trademarks and Trade Names [Member] | MinimumMember
Finite-Lived Intangible Assets
Estimated Useful Life (in years)	5 years
Software and publications [Member]
Intangible Assets
Intangible assets, gross	$ 1,300	1,300
Accumulated amortization	$ (1,300)	$ (1,300)
Intangible assets, net
Finite-Lived Intangible Assets
Estimated Useful Life (in years)	3 years
Customer Relationships [Member]
Intangible Assets
Intangible assets, gross	$ 12,093	$ 5,074
Accumulated amortization	(3,177)	(2,696)
Intangible assets, net	$ 8,916	2,378
Customer Relationships [Member] | MinimumMember
Finite-Lived Intangible Assets
Estimated Useful Life (in years)	2 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets
Estimated Useful Life (in years)	10 years
Noncompete Agreements [Member]
Intangible Assets
Intangible assets, gross	$ 1,240	700
Accumulated amortization	(616)	(500)
Intangible assets, net	624	200
Developed Technology [Member]
Intangible Assets
Intangible assets, gross	1,335	820
Accumulated amortization	(306)	(205)
Intangible assets, net	$ 1,029	$ 615
Developed Technology [Member] | MinimumMember
Finite-Lived Intangible Assets
Estimated Useful Life (in years)	1 year
Developed Technology [Member] | Maximum [Member]
Finite-Lived Intangible Assets
Estimated Useful Life (in years)	5 years
Employment/non-compete agreements [Member]
Finite-Lived Intangible Assets
Estimated Useful Life (in years)	5 years