Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Deferred Tax Assets: Fixed asset and intangible amortization, net	$ 520	$ 683
Deferred Tax Assets: Inventory allowances	636	466
Deferred Tax Assets: Accrued liabilities	287	328
Deferred Tax Assets: Warranty accrual	178	241
Deferred Tax Assets: Deferred Revenue	419	332
Deferred Tax Assets: Accounts receivable allowance	244	269
Deferred Tax Assets: Federal and state tax credits	3,014	2,569
Deferred Tax Assets: Federal and state net operating loss carry forwards	3,138	634
Deferred Tax Assets: Foreign net operating loss carry forwards	838	882
Deferred Tax Assets: Stock based compensation	437	411
Deferred Tax Assets: Unrealized gains and losses - other comprehensive income (loss)	8	7
Deferred Tax Assets: Other, net	139	141
Deferred Tax Assets: Subtotal	9,858	6,963
Deferred Tax Assets: Valuation allowance	(9,627)	(6,333)
Deferred Tax Assets: Total deferred tax assets	231	630
Deferred Tax Liabilities: Fixed asset and intangible amortization, net	75	109
Deferred Tax Liabilities: Inventory allowance		15
Deferred Tax Liabilities: Unrealized gains and losses - other comprehensive income (loss)		72
Deferred Tax Liabilities: Subtotal	75	196
Deferred Tax Liabilities: Total deferred tax liabilities	$ 75	$ 196