Income Taxes (Details 1) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets (liabilities):
Inventories	$ 27,122	$ 104,190
Stock options and other	58,050	93,985
Alternative Minimum Tax credit carryforward	1,703	24,674
Contingencies and accruals	81,907	152,846
Property and equipment	(228,460)	(214,383)
Net operating loss carryforward	7,376,283	12,174,859
Total deferred tax assets, net	7,316,605	12,336,171
Valuation allowance	$ 7,316,605	$ (12,336,171)