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17. INCOME TAXES (Details-Deferred tax assets and liabilities) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred tax assets: |  |
Charitable contributions | $ 2,900 | $ 2,900
Reserve for bad debt | 17,805 | 17,948
Stock options | 3,448,014 | 3,416,792
Deferred Revenue | 233,883 | 0
Depreciation | 22,937 | 6,920
Other | 19,661 | 17,674
Net operating loss carryforward | 7,755,622 | 6,957,507
Total gross deferred tax assets | 11,500,822 | 10,419,741
Less: Deferred tax asset valuation allowance | (11,432,888) | (10,351,807)
Total net deferred tax assets | 67,934 | 67,934
Deferred tax liabilities: |  |
Accrued salaries | (67,934) | (67,934)
Total deferred tax liabilities | (67,934) | (67,934)
Total net deferred taxes | $ 0 | $ 0

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