Annual report pursuant to Section 13 and 15(d)

SALE OF COMMON STOCK (Details Textual)

v3.3.1.900
SALE OF COMMON STOCK (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Jan. 31, 2013
Securities Financing Transaction [Line Items]        
Proceeds from Issuance of Common Stock $ 47,685,000 $ 47,836,000 $ 10,042,000  
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 4.25 $ 12.00
Description Of Option Granted Under Underwriting Agreement     the Company also granted the Third Underwriters an option for a period of 45 days to purchase up to (i) 402,000 additional Units or (ii) 402,000 additional shares of common stock and/or additional Warrants to purchase up to 402,000 shares of common stock, on the same terms, to cover over-allotments, if any.  
Description Of Unit     Each Unit consisted of (i) one share of common stock and (ii) one Series A Warrant (the Warrants) to purchase one share of common stock.  
Discount [Member]        
Securities Financing Transaction [Line Items]        
Stock Issued During Period Shares Warrants Exercised1     900,000  
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 0.34  
Common Stock [Member]        
Securities Financing Transaction [Line Items]        
Stock Issued During Period, Shares, New Issues 31,999 0    
Stock Issued During Period Shares Warrants Exercised1     2,680,000  
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 4.25      
February 2015 Financing [Member]        
Securities Financing Transaction [Line Items]        
Stock Issued During Period, Shares, New Issues 4,900,000      
Share Price $ 5.85      
Underwriters Over Allotment Number of Shares 735,000      
Common Stock Issuance, Discount Amount $ 1,700,000      
Common Stock Issuance, Discount Price Per Share $ 0.35      
Payments of Stock Issuance Costs $ 300,000      
Proceeds from Issuance of Common Stock $ 26,700,000      
Underwriters Exercised Overallotment Option To Purchase Additional Warrants 418,700      
February 2015 Financing [Member] | Common Stock [Member]        
Securities Financing Transaction [Line Items]        
Payments of Stock Issuance Costs $ 100,000      
Proceeds from Issuance of Common Stock $ 2,300,000      
July 2015 Financing [Member]        
Securities Financing Transaction [Line Items]        
Stock Issued During Period, Shares, New Issues 2,325,000      
Share Price $ 7.50      
Underwriters Over Allotment Number of Shares 348,750      
Common Stock Issuance, Discount Amount $ 1,000,000      
Common Stock Issuance, Discount Price Per Share $ 0.45      
Payments of Stock Issuance Costs $ 200,000      
Proceeds from Issuance of Common Stock 16,200,000      
July 2015 Financing [Member] | Common Stock [Member]        
Securities Financing Transaction [Line Items]        
Common Stock Issuance, Discount Amount $ 200,000      
Common Stock Issuance, Discount Price Per Share $ 0.45      
Proceeds from Issuance of Common Stock $ 2,500,000      
Underwriters Exercised Overallotment Option To Purchase Additional Warrants 348,750      
July 2014 Financing [Member]        
Securities Financing Transaction [Line Items]        
Stock Issued During Period, Shares, New Issues   657,000    
Share Price   $ 11.90    
Payments of Stock Issuance Costs   $ 600,000    
Proceeds from Issuance of Common Stock   $ 7,182,670    
January 2014 Financing [Member]        
Securities Financing Transaction [Line Items]        
Stock Issued During Period, Shares, New Issues 2,898,550      
Share Price $ 15.00 $ 0.90    
Underwriters Over Allotment Number of Shares 434,782      
Common Stock Issuance, Discount Amount   $ 2,608,695    
Payments of Stock Issuance Costs   215,756    
Proceeds from Issuance of Common Stock   $ 40,653,799    
August 2013 Financing [Member]        
Securities Financing Transaction [Line Items]        
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 4.25  
Underwriters Exercised Overallotment Option To Purchase Additional Warrants     402,000  
Expense Related to Distribution or Servicing and Underwriting Fees     $ 4,000  
Warrants Granted Under Underwriting Agreement     107,200  
Under writers Warrants [Member] | August 2013 Financing [Member]        
Securities Financing Transaction [Line Items]        
Proceeds from Issuance of Common Stock     $ 10,000,000  
Expense Related to Distribution or Servicing and Underwriting Fees     $ 400,000