STOCKHOLDERS' EQUITY (Details) - $ / shares
1 Months Ended 2 Months Ended 6 Months Ended 12 Months Ended
Oct. 31, 2017
Feb. 28, 2017
Dec. 31, 2016
Jun. 24, 2016
Mar. 31, 2017
Jun. 30, 2018
Dec. 31, 2017
Dec. 31, 2016
Restricted Stock Unit                
Granted 8,621              
Vested and converted     (1,000)          
Forfeited     (2,000)          
Restricted Stock Units (RSUs) [Member]                
Restricted Stock Unit                
Beginning Balance           1,061,471 845,765 842,770
Granted   25,000   5,995   54,874 241,051 5,995
Vested and converted         (5,591) (85,135) (21,586) (1,000)
Forfeited         (3,759) 0 (3,759) (2,000)
Ending Balance     845,765     1,031,210 1,061,471 845,765
Weighted Average Grant-Date Fair Value Per Share                
Beginning Balance           $ 5.68 $ 5.68 $ 5.60
Granted           2.16 3.19 4.21
Vested and converted           2.15 3.55 3.50
Forfeited           0 3.41 3.50
Ending Balance     $ 5.68     $ 5.25 $ 5.68 $ 5.68