Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
Expiration date	2032
Deferred tax assets [Abstract]
Inventory reserve	$ 1,022,000	$ 737,000
Fixed assets	0	0
Other reserves and accruals	92,000	224,000
Stock-based compensation	173,000	77,000
Undistributed foreign earnings	0	0
Other	0	0
Tax credit carry-forwards	1,464,000	1,557,000
Federal tax loss carry-forwards	2,116,000	2,020,000
State tax loss carry-forwards	513,000	0
Foreign tax loss carry-forwards	52,000	497,000
Total deferred income tax assets	5,432,000	5,112,000
Valuation allowance	(307,000)	(263,000)
Net deferred tax assets	5,125,000	4,849,000
Deferred tax liabilities [Abstract]
Deferred Tax Liability Inventory	0	0
Fixed assets	443,000	528,000
Deferred Tax Liability Other Accruals	0	0
Deferred Tax Liability, Stock-Based Compensation	0	0
Undistributed foreign earnings	725,000	919,000
Other	35,000	57,000
Total deferred income tax liabilities	1,203,000	1,504,000
Current:
Federal	0	0
State and local	2,000	0
Foreign	50,000	180,000
Total Current	52,000	180,000
Deferred:
Federal	(527,000)	25,000
State and local	3,000	(20,000)
Deferred Foreign Income Tax Expense (Benefit)	(52,000)	0
Total Deferred	(576,000)	5,000
Provision (benefit) for income taxes	(524,000)	185,000
Reconciliation of provision (benefit) for income taxes [Abstract]
Tax provision at expected statutory rate	(627,000)	193,000
State taxes, net of federal benefit	6,000	(29,000)
Permanent differences	21,000	17,000
Credits	0	(217,000)
Changes in estimated research and development credits	93,000	0
Foreign tax expense, and other	(16,000)	221,000
Change in valuation allowance	(1,000)	0
Provision (benefit) for income taxes	(524,000)	185,000
(Loss) income before income taxes from domestic operations	(1,638,000)	(473,000)
Profit before income taxes from foreign operations	(206,000)	1,075,000
Earnings of Company's foreign subsidiaries not considered to be indefinitely reinvested	(315,000)
Earnings of non-U.S. subsidiaries considered to be indefinitely reinvested	589,000
Net operating loss carryforwards from state of Georgia	7,760,000
Minimum [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration date	Dec. 31, 2018
Maximum [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration date	Dec. 31, 2020
Research and development credit carryforwards [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward amount	994,000
Foreign tax credit carryforwards [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward amount	359,000
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	6,223,000
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 14,817,000