Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Provision (benefit) for income taxes	$ 8,000	$ (4,000)
Tax Credit Carryforward [Line Items]
Alternative minimum tax	$ 111,000
Expiration date	Dec. 31, 2035
Deferred tax assets [Abstract]
Inventory reserve	$ 1,179,000	1,151,000
Fixed assets	0	0
Other reserves and accruals	173,000	109,000
Stock-based compensation	380,000	367,000
Undistributed foreign earnings	0	0
Other	0	1,000
Tax credit carry-forwards	1,840,000	1,755,000
Federal tax loss carry-forwards	3,270,000	3,220,000
State tax loss carry-forwards	915,000	901,000
Foreign tax loss carry-forwards	269,000	268,000
Total deferred income tax assets	8,026,000	7,772,000
Valuation allowance	(7,631,000)	(7,326,000)
Net deferred	0	0
Deferred tax assets	395,000	446,000
Deferred tax liabilities [Abstract]
Deferred Tax Liability Inventory	0	0
Fixed assets	230,000	285,000
Deferred Tax Liability Other Accruals	0	0
Deferred Tax Liability, Stock-Based Compensation	0	0
Undistributed foreign earnings	97,000	86,000
Other	68,000	75,000
Total deferred income tax liabilities	395,000	446,000
Deferred tax assets (liabilities), net	0	0
Current:
Federal	0	0
State and local	8,000	5,000
Foreign	0	(9,000)
Total Current	8,000	(4,000)
Deferred:
Federal	(292,000)	(985,000)
State and local	(12,000)	(381,000)
Deferred Foreign Income Tax Expense (Benefit)	(1,000)	8,000
Total before change in valuation allowance	(305,000)	(1,358,000)
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance	305,000	1,358,000
Net deferred	0	0
Reconciliation of provision (benefit) for income taxes [Abstract]
Tax provision at expected statutory rate	(239,000)	(962,000)
State taxes, net of federal benefit	4,000	(57,000)
Permanent differences	8,000	(5,000)
Credits	(97,000)	(56,000)
Changes in estimated research and development credits	0	0
Foreign tax expense, and other	27,000	(282,000)
Change in valuation allowance for utilization of Georgia State net operating loss	305,000	1,358,000
Provision (benefit) for income taxes	8,000	(4,000)
(Loss) income before income taxes from domestic operations	(731,000)	(2,832,000)
Profit before income taxes from foreign operations	28,000	$ 4,000
Earnings of Company's foreign subsidiaries not considered to be indefinitely reinvested	(35,000)
Earnings of non-U.S. subsidiaries considered to be indefinitely reinvested	475,000
Research and Development Credit Carryforwards [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward amount	$ 1,371,000
Research and Development Credit Carryforwards [Member] | Minimum [Member]
Tax Credit Carryforward [Line Items]
Expiration date	Dec. 31, 2020
Research and Development Credit Carryforwards [Member] | Maximum [Member]
Tax Credit Carryforward [Line Items]
Expiration date	Dec. 31, 2035
Foreign Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward amount	$ 359,000
Foreign Tax Credit Carryforward [Member] | Minimum [Member]
Tax Credit Carryforward [Line Items]
Expiration date	Dec. 31, 2018
Foreign Tax Credit Carryforward [Member] | Maximum [Member]
Tax Credit Carryforward [Line Items]
Expiration date	Dec. 31, 2020
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 9,617,000
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 24,130,000