Selected Balance Sheet Accounts (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Intangible Assets
Intangible assets, gross	$ 14,468	$ 10,632
Accumulated amortization	(10,295)	(8,811)
Intangible assets, net	4,173	1,821	[1]
Trademarks and Trade Names [Member]
Intangible Assets
Intangible assets, gross	6,574	5,582
Accumulated amortization	(5,594)	(5,209)
Intangible assets, net	980	373
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	5,074	2,320
Accumulated amortization	(2,696)	(1,926)
Intangible assets, net	2,378	394
Customer Relationships [Member] | Minimum [Member]
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)	5 years
Noncompete Agreements [Member]
Intangible Assets
Intangible assets, gross	700	610
Accumulated amortization	(500)	(335)
Intangible assets, net	200	275
Developed Technology Rights [Member]
Intangible Assets
Intangible assets, gross	820	820
Accumulated amortization	(205)	(41)
Intangible assets, net	$ 615	$ 779
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

[1] Amounts were derived from audited financial statements