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Income Taxes (Details 1) - USD ($) | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Deferred tax assets (liabilities): |  |
Inventories | $ 103,909 | $ 82,274
Stock options and other | 88,303 | 96,009
Alternative Minimum Tax credit carryforward | 24,674 | 24,674
Contingencies and accruals | 157,936 | 90,829
Property and equipment | (454,788) | (340,099)
Capital loss carryover | 0 | 25,420
Net operating loss carryforward | 11,136,538 | 10,499,884
Intangibles | (4,687) | 179
Total deferred tax assets, net | 11,051,885 | 10,479,170
Valuation allowance | $ (11,051,885) | $ (10,479,170)

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