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15. INCOME TAXES (Details-Deferred tax assets and liabilities) - USD ($) | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Deferred tax assets: |  |
Charitable contributions | $ 4,128 | $ 4,128
Reserve for bad debt | 25,345 | 20,684
Stock options | 4,599,689 | 4,593,382
Inventory Adjustment | 11,067 | 0
Other | 19,634 | 15,702
Net operating loss carryforward | 8,297,039 | 7,485,682
Total gross deferred tax assets | 12,956,902 | 12,119,578
Less: Deferred tax asset valuation allowance | (12,853,622) | (11,999,461)
Total net deferred tax assets | 103,280 | 120,117
Deferred tax liabilities: |  |
Accrued salaries | (96,704) | (96,704)
Accrued vacation | 0 | (13,848)
Depreciation | (6,576) | (9,565)
Total deferred tax liabilities | (103,280) | (120,117)
Total net deferred taxes | $ 0 | $ 0

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