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16. STOCK OPTIONS AND WARRANTS (Details-Option Activity) - Employee Stock Option [Member] - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Number of Options
Number of Options Outstanding, Beginning	239,704	296,406
Number of Options Granted	105,604	58,204
Number of Options Exercised	(3,000)	0
Number of Options Forfeited	(500)	(84,350)
Number of Options Expired	0	(30,556)
Number of Options Outstanding, Ending	341,808	239,704
Number of Options Exercisable, Ending	233,475
Weighted Average Exercise Price
Weighted Average Exercise Price Outstanding, Beginning	$ 9.25	$ 11.5
Weighted Average Exercise Price Granted	15.63	5.52
Weighted Average Exercise Price Exercised	4.09
Weighted Average Exercise Price Forfeited	5.27	11.71
Weighted Average Exercise Price Expired		16.37
Weighted Average Exercise Price Outstanding, Ending	11.27	$ 9.25
Weighted Average Exercise Price Exercisable, Ending	$ 12.23

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- Definition

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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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 or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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 price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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