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CONSOLIDATED CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (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       $ 6     $ 413,356 $ 1,387 $ (401,749)
Balance (in shares) at Dec. 31, 2017   2,431     5,782,573          
Share-based compensation 143             143    
Sale of common stock, net 27             27    
Sale of common stock, net (in shares)         10,069          
Conversion of Convertible Preferred Stock into common stock (share)     (1,228)     368,738        
Foreign currency translation adjustment and accumulated other comprehensive income (281)               (281)  
Net loss (4,409)                 (4,409)
Balance at Mar. 31, 2018 8,480       $ 6     413,526 1,106 (406,158)
Balance (in shares) at Mar. 31, 2018   1,203     6,161,380          
Balance at Dec. 31, 2018 $ 5,225       $ 15     418,375 1,218 (414,383)
Balance (in shares) at Dec. 31, 2018 14,830,414 4,606     14,830,414          
Share-based compensation $ 49             49    
Sale of common stock, net 1,873       $ 7     1,866    
Sale of common stock, net (in shares)         6,992,736          
Conversion of Convertible Preferred Stock into common stock (share)       (66)     82,645      
Foreign currency translation adjustment and accumulated other comprehensive income (140)               (140)  
Net loss (3,150)                 (3,150)
Balance at Mar. 31, 2019 $ 3,857       $ 22     $ 420,290 $ 1,078 $ (417,533)
Balance (in shares) at Mar. 31, 2019 14,830,414 4,540     21,905,795