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13. STOCK-BASED COMPENSATION (Details) - $ / shares | 12 Months Ended
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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

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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