Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY (Details Textual)

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STOCKHOLDERS' EQUITY (Details Textual) - USD ($)
1 Months Ended 3 Months Ended
Feb. 28, 2018
Mar. 31, 2019
Mar. 31, 2018
Class of Stock [Line Items]      
Proceeds from issuance of common stock   $ 0 $ 81,822,066
Underwritten Public Offering [Member]      
Class of Stock [Line Items]      
Stock Issued During Period, Shares, New Issues 6,164,000    
Share Price $ 14.00    
Proceeds from issuance of common stock $ 81,819,073    
Payments of Stock Issuance Costs 4,476,927    
Proceeds From Issuance Of Common Stock Gross $ 86,296,000    
Over-Allotment Option [Member]      
Class of Stock [Line Items]      
Stock Issued During Period, Shares, New Issues 804,000