Selected Balance Sheet Accounts (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Intangible Assets
Intangible assets, gross	$ 14,381	$ 10,632
Accumulated amortization	(9,148)	(8,811)
Intangible assets, net	5,233	1,821	[1]
Trademarks and Trade Names [Member]
Intangible Assets
Intangible assets, gross	6,581	5,582
Accumulated amortization	(5,298)	(5,209)
Intangible assets, net	1,283	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	4,980	2,320
Accumulated amortization	(2,094)	(1,926)
Intangible assets, net	2,886	394
Finite-Lived Intangible Assets
Estimated Useful Life (in years)	3 years
Noncompete Agreements [Member]
Intangible Assets
Intangible assets, gross	700	610
Accumulated amortization	(374)	(335)
Intangible assets, net	326	275
Developed Technology [Member]
Intangible Assets
Intangible assets, gross	820	820
Accumulated amortization	(82)	(41)
Intangible assets, net	$ 738	$ 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