Income Tax Expense (Components of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred:
Net operating loss carryforwards	$ 53,247	$ 54,389
Accrued expenses	846	711
Accrued expenses	8,590	8,400
Tax credits	131	183
Inventory	597	578
Capitalized research and development	3,740	0
Deferred compensation	3,043	2,364
Valuation allowance	70,194	66,625
Total deferred tax assets	(49,793)	(50,866)
Deferred Tax Assets, Net of Valuation Allowance	20,401	15,759
Deferred Tax Liabilities, Net [Abstract]
Depreciation and amortization	(1,034)	(101)
Convertible debt	(4,116)	0
Other	(377)	(89)
Total deferred tax liabilities	21,536	16,794
Net deferred tax liability	(1,135)	(1,035)
Trademarks and trade names
Deferred Tax Liabilities, Net [Abstract]
Deferred Tax Liabilities, Intangible Assets	(1,012)	(1,029)
Developed Technology and Trademark
Deferred Tax Liabilities, Net [Abstract]
Deferred Tax Liabilities, Intangible Assets	$ (14,997)	$ (15,575)