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CONSOLIDATED CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (UNAUDITED) - USD ($)
$ in Thousands
Total
Convertible Preferred Stock [Member]
Convertible Preferred Stock [Member]
Series B Convertible Preferred Stock [Member]
Convertible Preferred Stock [Member]
Series C Convertible Preferred Stock [Member]
Common Stock [Member]
Common Stock [Member]
Series B Convertible Preferred Stock [Member]
Common Stock [Member]
Series C Convertible Preferred Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income [Member]
Accumulated Deficit [Member]
Balance at Dec. 31, 2017 $ 13,000             $ 413,362 $ 1,387 $ (401,749)
Balance (in shares) at Dec. 31, 2017   2,431     115,652          
Share-based compensation 143             143    
Sale of common stock, net 27             27    
Sale of common stock, net (in shares)         202          
Conversion of Convertible Preferred Stock into common stock (share)     (1,228)     7,375        
Foreign currency translation adjustment and accumulated other comprehensive income (281)               (281)  
Net loss (4,409)                 (4,409)
Balance at Mar. 31, 2018 8,480             413,532 1,106 (406,158)
Balance (in shares) at Mar. 31, 2018   1,203     123,229          
Balance at Dec. 31, 2017 13,000             413,362 1,387 (401,749)
Balance (in shares) at Dec. 31, 2017   2,431     115,652          
Net loss (8,068)                  
Balance at Jun. 30, 2018 4,751             413,331 1,237 (409,817)
Balance (in shares) at Jun. 30, 2018   1,186     123,524          
Balance at Mar. 31, 2018 8,480             413,532 1,106 (406,158)
Balance (in shares) at Mar. 31, 2018   1,203     123,229          
Share-based compensation 96             96    
Sale of common stock, net (297)             (297)    
Sale of common stock, net (in shares)         192          
Conversion of Convertible Preferred Stock into common stock (share)     (17)     103        
Foreign currency translation adjustment and accumulated other comprehensive income 131               131  
Net loss (3,659)                 (3,659)
Balance at Jun. 30, 2018 4,751             413,331 1,237 (409,817)
Balance (in shares) at Jun. 30, 2018   1,186     123,524          
Balance at Dec. 31, 2018 $ 5,225             418,390 1,218 (414,383)
Balance (in shares) at Dec. 31, 2018 296,609 4,606     296,609          
Share-based compensation $ 49             49    
Sale of common stock, net 1,873             1,873    
Sale of common stock, net (in shares)         139,855          
Conversion of Convertible Preferred Stock into common stock (share)       (66)     1,653      
Foreign currency translation adjustment and accumulated other comprehensive income (140)               (140)  
Net loss (3,150)                 (3,150)
Balance at Mar. 31, 2019 3,857             420,312 1,078 (417,533)
Balance (in shares) at Mar. 31, 2019   4,540     438,117          
Balance at Dec. 31, 2018 $ 5,225             418,390 1,218 (414,383)
Balance (in shares) at Dec. 31, 2018 296,609 4,606     296,609          
Net loss $ (12,297)                  
Balance at Jun. 30, 2019 $ (6,276)             420,404   (426,680)
Balance (in shares) at Jun. 30, 2019 296,609 4,540     443,117          
Balance at Mar. 31, 2019 $ 3,857             420,312 1,078 (417,533)
Balance (in shares) at Mar. 31, 2019   4,540     438,117          
Share-based compensation 28             28    
Sale of common stock, net 64             64    
Sale of common stock, net (in shares)         5,000          
Foreign currency translation adjustment and accumulated other comprehensive income (1,078)               $ (1,078)  
Net loss (9,147)                 (9,147)
Balance at Jun. 30, 2019 $ (6,276)             $ 420,404   $ (426,680)
Balance (in shares) at Jun. 30, 2019 296,609 4,540     443,117