Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY (Details)

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STOCKHOLDERS' EQUITY (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended
Apr. 06, 2018
Mar. 27, 2018
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Class of Stock [Line Items]          
Common stock, shares authorized     47,000,000   47,000,000
Net proceeds from the sale of common stock from private placement offering     $ 0 $ 15,025  
Net proceeds from units issued in the period     $ 21,190    
Preferred stock, shares authorized     3,000,000   3,000,000
Common Stock          
Class of Stock [Line Items]          
New shares issued (in shares)   5,714,286 6,571,428    
Share price (in dollars per share)   $ 3.50      
Net proceeds from the sale of common stock from private placement offering   $ 20,000      
Net proceeds from units issued in the period   $ 18,400 $ 7    
Over-Allotment Option | Common Stock          
Class of Stock [Line Items]          
New shares issued (in shares) 857,142        
Share price (in dollars per share) $ 3.50        
Net proceeds from the sale of common stock from private placement offering $ 3,000        
Net proceeds from units issued in the period $ 2,800