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13. STOCK-BASED COMPENSATION (Details Narrative) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Share-based Payment Arrangement [Abstract] |  |
Stock-based compensation expense - options | $ 45,900 | $ 496,200
Aggregate intrinsic value of options outstanding and exercisable | $ 0 |
Stock price | $ 2.55 | $ 3.90
Aggregate intrinsic value of options exercised | $ 922,429 | $ 119,059

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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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