Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Deferred Tax Assets: Fixed asset and intangible amortization, net	$ 683	$ 940
Deferred Tax Assets: Inventory allowances	466	497
Deferred Tax Assets: Accrued liabilities	328	309
Deferred Tax Assets: Warranty accrual	241	344
Deferred Tax Assets: Deferred Revenue	332	500
Deferred Tax Assets: Accounts receivable allowance	269	328
Deferred Tax Assets: Federal and state tax credits	2,569	2,220
Deferred Tax Assets: Federal and state net operating loss carry forwards	634	262
Deferred Tax Assets: Foreign net operating loss carry forwards	882	311
Deferred Tax Assets: Stock based compensation	411	468
Deferred Tax Assets: Unrealized gains and losses - other comprehensive income (loss)	7	164
Deferred Tax Assets: Other, net	141	138
Deferred Tax Assets: Subtotal	6,963	6,481
Deferred Tax Assets: Valuation allowance	(6,333)	(833)
Deferred Tax Assets: Total deferred tax assets	630	5,648
Deferred Tax Liabilities: Fixed asset and intangible amortization, net	109	34
Deferred Tax Liabilities: Inventory allowance	15
Deferred Tax Liabilities: Unrealized gains and losses - other comprehensive income (loss)	72
Deferred Tax Liabilities: Subtotal	196	34
Deferred Tax Liabilities: Total deferred tax liabilities	$ 196	$ 34