Income Taxes (Componentes of Deferred Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Allowance for doubtful accounts	$ 389	$ 415
Inventory reserve	2,814us-gaap_DeferredTaxAssetsInventory	1,954us-gaap_DeferredTaxAssetsInventory
Accrued liabilities	2,846	2,694
Other, current	5,446us-gaap_DeferredTaxAssetsOther	5,791us-gaap_DeferredTaxAssetsOther
Gross current deferred income tax assets	11,495us-gaap_DeferredTaxAssetsGrossCurrent	10,854us-gaap_DeferredTaxAssetsGrossCurrent
Valuation allowance	(10,960)	(9,635)
Net current deferred income tax assets	535	1,219
Net operating losses	91,085	88,086
Depreciation and amortization	370	439
Capital loss carry forwards	38,755	38,951
Gross long-term deferred income tax assets	130,210	127,476
Valuation allowance	(128,105)	(123,782)
Net long-term deferred income tax asset	2,105	3,694
Total	$ 2,640us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 4,913us-gaap_DeferredTaxAssetsLiabilitiesNet

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards.

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