12. SHARE-BASED COMPENSATION (Details 2) - $ / shares	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of options outstanding	3,931,586	2,928,750	2,067,500
Weighted average remaining contractual term outstanding	4 years 10 months 20 days	3 years 8 months 16 days
Weighted average exercise price outstanding	$ 4.41	$ 2.96	$ 1.68
Weighted average exercise price exerciseable	$ 2.68
$1.50
Number of options outstanding	1,422,750
Weighted average remaining contractual term outstanding	3 years 4 months 20 days
Weighted average exercise price outstanding	$ 1.50
Number exercisable	1,422,750
Weighted average exercise price exerciseable	$ 1.50
$3.15 - $3.61
Number of options outstanding	85,000
Weighted average remaining contractual term outstanding	2 years 10 months 10 days
Weighted average exercise price outstanding	$ 3.75
Number exercisable	85,000
Weighted average exercise price exerciseable	$ 3.75
$4.26 - $6.58
Number of options outstanding	2,073,836
Weighted average remaining contractual term outstanding	5 years 10 months 20 days
Weighted average exercise price outstanding	$ 5.29
Number exercisable	583,334
Weighted average exercise price exerciseable	$ 5.41
$11.22
Number of options outstanding	350,000
Weighted average remaining contractual term outstanding	9 years 6 months 29 days
Weighted average exercise price outstanding	$ 11.22
Number exercisable	0
Weighted average exercise price exerciseable	$ .00

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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