STOCKHOLDERS' EQUITY (Details 1) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity Incentive Plans Restricted Stock Activity [Line Items]
Number of Shares, Outstanding at Begining Balance	8,642,055	7,359,915	6,400,001
Number of Shares, Granted	1,836,511	1,924,639	1,992,535
Number of Shares, Vested	(4,103,048)	(595,726)	(1,001,455)
Number of Shares, Forfeited	(53,875)	(46,773)	(31,166)
Number of Shares, Outstanding at Ending Balance	6,321,643	8,642,055	7,359,915
Weighted Average Grant Date Fair Value, Outstanding at Begining Balance	$ 7.20	$ 7.83	$ 5.86
Weighted Average Grant Date Fair Value, Granted	6.40	4.99	12.89
Weighted Average Grant Date Fair Value, Vested	5.24	7.38	5.04
Weighted Average Grant Date Fair Value, Forfeited	8.47	10.34	16.76
Weighted Average Grant Date Fair Value, Outstanding at Ending Balance	$ 7.17	$ 7.20	$ 7.83