Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Tax Credit Carryforward [Line Items]
Alternative minimum tax	$ 111,000
Expiration date	Dec. 31, 2036
Current:
Federal	$ 0	$ 0
State and local	8,000	8,000
Foreign	41,000	0
Total Current	49,000	8,000
Deferred:
Federal	(211,000)	(292,000)
State and local	267,000	(12,000)
Foreign	55,000	(1,000)
Total before change in valuation allowance	111,000	(305,000)
Change in Valuation Allowance	(325,000)	305,000
Net deferred	(214,000)	0
(Benefit) provision for income taxes	(165,000)	8,000
Reconciliation of provision (benefit) for income taxes [Abstract]
Tax provision at expected statutory rate	(8,000)	(239,000)
State taxes, net of federal benefit	(25,000)	4,000
Permanent differences	6,000	8,000
Credits	(123,000)	(97,000)
Foreign tax expense, and other	11,000	27,000
True-up to State NOL	299,000	0
Change in Valuation Allowance	(325,000)	305,000
(Benefit) provision for income taxes	(165,000)	8,000
Loss before income taxes from domestic operations	(438,000)	(731,000)
Profit before income taxes from foreign operations	417,000	28,000
Earnings of Company's foreign subsidiaries not considered to be indefinitely reinvested	153,000
Earnings of non-U.S. subsidiaries considered to be indefinitely reinvested	628,000
Deferred tax assets [Abstract]
Inventory reserve	1,083,000	1,179,000
Fixed assets	0	0
Other reserves and accruals	213,000	173,000
Stock-based compensation	384,000	380,000
Undistributed foreign earnings	0	0
Other	0	0
Tax credit carry-forwards	1,921,000	1,840,000
Federal tax loss carry-forwards	3,428,000	3,270,000
State tax loss carry-forwards	627,000	915,000
Foreign tax loss carry-forwards	214,000	269,000
Total deferred income tax assets	7,870,000	8,026,000
Valuation allowance	(7,305,000)	(7,631,000)
Net deferred tax assets	214,000	0
Deferred tax liabilities [Abstract]
Inventory reserve	0	0
Fixed assets	151,000	230,000
Other reserves and accruals	0	0
Stock-Based Compensation	0	0
Undistributed foreign earnings	144,000	97,000
Other	56,000	68,000
Total deferred income tax liabilities	351,000	395,000
Deferred tax assets (liabilities), net	214,000	$ 0
Research and Development Credit Carryforwards [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward amount	$ 1,450,000
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, 2036
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	$ 10,075,000
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 16,263,000