7. STOCKHOLDERS' EQUITY (Details 2) - Common Stock Warrant [Member] - $ / shares	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Number of Warrants
Outstanding, beginning of year	35,501,411	37,076,413
Granted	250,000	4,774,998
Exercised	0	(975,000)
Expired	(9,200,800)	(5,375,000)
Outstanding, end of year	26,550,611	35,501,411
Weighted Average Exercise Price
Outstanding, beginning of year	$ 0.33	$ 0.31
Granted	0.08	0.24
Exercised	0.00	0.05
Expired	(0.30)	0.13
Outstanding, end of year	$ 0.34	$ 0.33

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.

+ 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
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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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- Definition

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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- Definition

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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