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STOCK-BASED COMPENSATION (Details) - 6 months ended Jun. 30, 2015 - $ / shares
Total
Number of options, outstanding  
Outstanding, beginning of period 2,864,000
Granted 160,000
Exercised (97,000)
Cancelled (419,000)
Outstanding, end of period 2,508,000
Weighted average exercise price  
Outstanding, beginning of period $ 3.69
Granted 3.02
Exercised 2.25
Cancelled 2.77
Outstanding, end of period $ 3.71