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13. STOCK-BASED COMPENSATION (Details Narrative) - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Share-based Compensation [Abstract] |  |
Aggregate intrinsic value of options outstanding and exercisable | $ 10,571 |
Intrinsic value of options exercised |  | $ 1,479,042
Issued common stock upon cashless exercise, shares | 0 | 1,831,500

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