XML 27 R6.htm IDEA: XBRL DOCUMENT v3.8.0.1
Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity - USD ($)
$ in Thousands
Total
Convertible Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Income
Accumulated Deficit
Balance at Dec. 31, 2015 $ 31,425   $ 1 $ 162,460 $ 1 $ (131,037)
Balance (in shares) at Dec. 31, 2015     762,005      
Stock-based compensation expense 635     635    
Issuance of common stock, net of issuance costs 957     957    
Issuance of common stock, net of issuance costs, shares     39,743      
Conversion of convertible securities, value 1     1    
Conversion of convertible securities, shares     8      
Unrealized (loss) gain on available-for-sale securities (2)       (2)  
Net loss (16,945)         (16,945)
Balance at Dec. 31, 2016 16,071   $ 1 164,053 (1) (147,982)
Balance (in shares) at Dec. 31, 2016     801,756      
Stock-based compensation expense 863     863    
Issuance of common stock, net of issuance costs 5,336     5,336    
Issuance of common stock, net of issuance costs, shares     439,880      
Issuance of convertible preferred stock, common stock and warrants for follow-on offering, net of issuance costs 18,563   $ 2 18,561    
Issuance of convertible preferred stock, common stock and warrants for follow-on offering, net of issuance costs, shares   13,350 1,470,000      
Issuance of common stock for follow-on offering S-3, net of issuance costs 9,684   $ 1 9,683    
Issuance of common stock for follow-on offering S-3, net of issuance costs, shares     1,105,263      
Issuance of common stock upon exercise of warrants 1,817     1,817    
Issuance of common stock upon exercise of warrants, shares     330,331      
Conversion of convertible securities, value     $ 2 (2)    
Conversion of convertible securities, shares   (9,670) 1,934,000      
Deemed dividend for preferred stock beneficial conversion feature       3,951   (3,951)
Unrealized (loss) gain on available-for-sale securities 1       $ 1  
Net loss (21,561)         (21,561)
Balance at Dec. 31, 2017 $ 30,774   $ 6 $ 204,262   $ (173,494)
Balance (in shares) at Dec. 31, 2017   3,680 6,081,230