Quarterly report pursuant to Section 13 or 15(d)

FEBRUARY 2015 FINANCING (Details Textual)

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FEBRUARY 2015 FINANCING (Details Textual) - Equity Component [Domain] - Subsequent Event Type [Domain] - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Securities Financing Transaction [Line Items]    
Common Stock Issued During Period Per Share Two $ 5.85  
Payments of Stock Issuance Costs $ 2,115  
Proceeds from Issuance of Common Stock $ 29,000 $ 40,654
February 2015 Financing [Member]    
Securities Financing Transaction [Line Items]    
Stock Issued During Period, Shares, New Issues 4,900,000  
Underwriters over allotment number of shares 735,000  
Common Stock Issued During Period Per Share Two $ 5.85  
Common Stock Issuance, Discount Amount $ 1,700  
Common Stock Issuance, Discount Price Per Share $ 0.35  
Payments of Stock Issuance Costs $ 200  
Proceeds from Issuance of Common Stock $ 26,700  
Over-Allotment Option [Member]    
Securities Financing Transaction [Line Items]    
Sale of Stock, Number of Shares Issued in Transaction 418,700  
Sale of Stock, Consideration Received on Transaction $ 2,300