15. STOCK OPTIONS AND WARRANTS (Details-Option Activity) - $ / shares	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Weighted Average Exercise Price
Weighted average grant date fair value	$ 0.13	$ 0.10
Employee Stock Option [Member]
Number of Options
Number of Options Outstanding, Beginning	15,216,664	19,917,007
Number of Options Granted	707,500	645,000
Number of Options Exercised	0	0
Number of Options Forfeited	(1,015,000)	(1,095,000)
Number of Options Expired	(88,575)	(4,250,343)
Number of Options Outstanding, Ending	14,820,589	15,216,664
Number of Options Exercisable, Ending	14,674,758
Weighted Average Exercise Price
Weighted Average Exercise Price Outstanding, Beginning	$ 0.23	$ 0.25
Weighted Average Exercise Price Granted	0.20	0.16
Weighted Average Exercise Price Exercised	0.00	0.00
Weighted Average Exercise Price Forfeited	0.19	0.19
Weighted Average Exercise Price Expired	0.63	0.33
Weighted Average Exercise Price Outstanding, Ending	0.23	0.23
Weighted Average Exercise Price Exercisable, Ending	0.23
Weighted average grant date fair value	$ 0.13	$ 0.10

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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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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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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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 price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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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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