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STOCK-BASED COMPENSATION (Details 3) - $ / shares
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Number of Shares    
Unvested at beginning of period 38,889,000 72,222,000
Restricted stock vested 8,333,000 (16,667,000)
Unvested at end of period 30,556,000 55,556,000
Weighted Average Grant-Date Fair Value per Share    
Unvested at beginning of period
Restricted stock granted 3.64
Restricted stock vested
Unvested at end of period $ 3.64 $ 3.64