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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