5. STOCK-BASED COMPENSATION (Details-Outstanding options and warrants) (Outstanding Options and Warrants [Member], USD $)	3 Months Ended
Mar. 31, 2015
Outstanding Options and Warrants [Member]
STOCK BASED COMPENSATION
Begining Balance	2,092,509
Granted	0
Exercised	(325,000)
Canceled or expired	(25,000)
Ending Balance	1,742,509
Exercisable at the end	1,699,176
Weighted Average Exercise price Per Common Share
Begining Balance	$ 3.58
Granted
Exercised	$ 2.69
Canceled or expired	$ 2.22
Ending Balance	$ 3.76
Exercisable at the end	$ 3.80
Weighted Average Remaining Contractual Life
Ending Balance	1 year 11 days
Exercisable at the end	11 months 19 days
Aggregate Intrinsic Value
Aggregate value outstanding	$ 8,230,904
Aggregate value exercisable	$ 7,955,304

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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.

+ References

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-Name Accounting Standards Codification

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

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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

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Number of share options (or share units) exercised during the current period.

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