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13. STOCK-BASED COMPENSATION (Details) - $ / shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Option and Warrants Outstanding, Beginning balance 2,399,000 2,744,000
Number of Option and Warrants Outstanding, Granted 80,000 655,000
Number of Option and Warrants Vested during the period 80,000 655,000
Number of Option and Warrants exercised in period (1,831,500) (182,500)
Number of Option and Warrants expired (462,500) (817,500)
Number of Option and Warrants Outstanding, Ending Balance 185,000 2,399,000
Weighted- Average Exercise price of Option and Warrants, outstanding beginning of period $ 1.39 $ 2.38
Weighted- Average Exercise price of Option and Warrants, granted in period $ 1.87 $ 1.49
Weighted- Average Exercise price of Option and Warrants, vested in period 1.87 1.49
Weighted- Average Exercise price of Option and Warrants, exercised in period $ 1.11 $ 1.12
Weighted- Average Exercise price of Option and Warrants, expired in period 2.24 4.86
Weighted- Average Exercise price of Option and Warrants, outstanding end of period $ 2.19 $ 1.39
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 $1.45 - $2.17 1.43 - $2.55
Range of Exercise Price per Common Share, Exercised $ 1.11 $ 1.12
Range of Exercise Price per Common Share, Expired $0.95 - $12.60 2.06 - $4.97
Range of Exercise Price per Common Share, Ending Balance $1.54 - $4.80 0.95 - $12.60