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STOCKHOLDERS' EQUITY (Details) - Unvested Restricted Stock [Member]
3 Months Ended
Mar. 31, 2017
$ / shares
shares
Equity Incentive Plans Restricted Stock Activity [Line Items]  
Number of Shares, Outstanding at Beginning Balance | shares 8,642,055
Number of Shares, Granted | shares 111,254
Number of Shares, Vested | shares (3,629,798)
Number of Shares, Forfeited | shares (4,495)
Number of Shares, Outstanding at Ending Balance | shares 5,119,016
Weighted Average Grant Date Fair Value, Outstanding at Beginning Balance | $ / shares $ 7.20
Weighted Average Grant Date Fair Value, Granted | $ / shares 4.80
Weighted Average Grant Date Fair Value, Vested | $ / shares 5.10
Weighted Average Grant Date Fair Value, Forfeited | $ / shares 4.65
Weighted Average Grant Date Fair Value, Outstanding at Ending Balance | $ / shares $ 6.21