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13. STOCK-BASED COMPENSATION (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Option and Warrants Outstanding, Beginning balance | 2,744,000 | 2,470,971
Number of Option and Warrants Outstanding, Granted | 655,000 | 735,000
Number of Option and Warrants Vested during the period | 655,000 | 735,000
Number of Option and Warrants exercised in period | (182,500) | (223,000)
Number of Option and Warrants expired | (817,500) | (238,971)
Number of Option and Warrants Outstanding, Ending Balance | 2,399,000 | 2,744,000
Weighted- Average Exercise price of Option and Warrants, outstanding beginning of period | $ 2.38 | $ 3.36
Weighted- Average Exercise price of Option and Warrants, granted in period | $ 1.49 | $ 1.05
Weighted- Average Exercise price of Option and Warrants, vested in period | 1.49 | 1.05
Weighted- Average Exercise price of Option and Warrants, exercised in period | $ 1.12 | $ 0.95
Weighted- Average Exercise price of Option and Warrants, expired in period | 4.86 | 9.56
Weighted- Average Exercise price of Option and Warrants, outstanding end of period | $ 1.39 | $ 2.38
Range of Exercise Price per Common Share, Beginning Balance | 0.95 - $12.60 | 0.95 - $12.60
Range of Exercise Price per Common Share, Granted and Vested | 1.43 - $2.55 | 0.98 - $2.55
Range of Exercise Price per Common Share, Exercised | $ 1.12 | $ 0.95
Range of Exercise Price per Common Share, Expired | 2.06 - $4.97 | 2.41 - $12.00
Range of Exercise Price per Common Share, Ending Balance | 0.95 - $12.60 | 0.95 - $12.60
Minimum [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Weighted- Average Exercise price of Option and Warrants, exercisable beginning of period | $ 0.95 |
Weighted- Average Exercise price of Option and Warrants, exercisable end of period |  | $ 0.95
Maximum [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Weighted- Average Exercise price of Option and Warrants, exercisable beginning of period | $ 12.60 |
Weighted- Average Exercise price of Option and Warrants, exercisable end of period |  | $ 12.60

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