9. STOCKHOLDERS' EQUITY (Details 2) - Common Stock Warrant - $ / shares	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Number of Warrants
Outstanding, beginning of year	26,550,611	35,501,411
Granted	1,300,000	250,000
Exercised	0	0
Expired	(10,610,088)	(9,200,800)
Outstanding, end of year	17,240,523	26,550,611
Weighted Average Exercise Price
Outstanding, beginning of year	$ 0.34	$ 0.33
Granted	0.11	0.08
Exercised	0.00	0.00
Expired	(0.23)	(0.30)
Outstanding, end of year	$ 0.39	$ 0.34

For presentations that combine terminations, 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 or that expired.

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Gross 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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-Publisher FASB
-Name Accounting Standards Codification
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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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Number of share options (or share units) exercised during the current period.

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