Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' EQUITY (Details Textual)

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STOCKHOLDERS' EQUITY (Details Textual) - USD ($)
 1 Months Ended 12 Months Ended
Nov. 01, 2016
Oct. 19, 2017
Nov. 23, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Stock Issued During Period, Shares, New Issues   5,750,000        
Stock Issued During Period, Value, New Issues   $ 92,000,000        
Shares Issued, Price Per Share $ 7.00 $ 16.00 $ 7.00      
Class of Warrant or Right, Outstanding       1,820,686    
July Financing Agent Warrants [Member]            
Class of Warrant or Right, Exercise Price of Warrants or Rights [1]       $ 6.05    
Class of Warrant or Right, Outstanding [1]       20,000    
Class Of Warrants Or Right Expiration Date [1]       Jul. 31, 2020    
May Financing Agent Warrants [Member]            
Class of Warrant or Right, Exercise Price of Warrants or Rights [2]       $ 11.00    
Class of Warrant or Right, Outstanding [2]       50,000    
Class Of Warrants Or Right Expiration Date [2]       May 11, 2020    
December Financing [Member]            
Proceeds from Warrant Exercises       $ 0.01    
Class of Warrant or Right, Exercise Price of Warrants or Rights [3]       $ 5.00    
Class of Warrant or Right, Outstanding [3]       1,749,186    
Class Of Warrants Or Right Expiration Date [3]       Dec. 24, 2019    
December Financing Agent Warrants [Member]            
Class of Warrant or Right, Exercise Price of Warrants or Rights [3]       $ 5.00    
Class of Warrant or Right, Outstanding [3]       1,500    
Class Of Warrants Or Right Expiration Date [3]       Dec. 18, 2019    
Series B Private Placements [Member]            
Class of Warrant or Right, Exercise Price of Warrants or Rights       $ 25.00    
Class of Warrant or Right, Outstanding       400,001    
Class Of Warrants Or Right Expiration Date       Oct. 24, 2018    
Dollar Five Warrant [Member]            
Proceeds from Warrant Exercises       $ 3,233,000 $ 885,000 $ 0
Class of Warrant or Right, Exercise Price of Warrants or Rights       $ 5.00 $ 5.00 $ 5.00
Class of Warrant or Right, Outstanding       1,820,686 2,934,685  
Common Stock [Member]            
Stock Issued During Period, Shares, New Issues 6,000,000   293,889      
Proceeds from Issuance or Sale of Equity     $ 44,057,000      
[1] In connection with the offering on July 31, 2015, the placement agent received warrants to purchase 20,000 shares of common stock at $6.05 per share. The warrants are exercisable and expire on July 31, 2020.
[2] In connection with the offering on May 11, 2015, the placement agent received warrants to purchase 50,000 shares of common stock at $11.00 per share. The warrants are exercisable and expire on May 11, 2020.
[3] In connection with an offering on December 24, 2014, warrants to purchase 3,500,000 shares of common stock at $5.00 per share were purchased and issued for $0.01 per warrant. The warrants are exercisable and expire on December 24, 2019. Also, in connection with the offering on December 24, 2014, the underwriter received warrants to purchase 68,735 shares of common stock at $5.00 per share. The warrants are exercisable and expire on December 18, 2019.