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CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (DEFICIT) - 9 months ended Sep. 30, 2018 - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Subscription Receivable [Member]
Accumulated Deficit [Member]
Cumulative Translation Adjustment [Member]
Balance at Dec. 31, 2017 $ (67,333) $ 329 $ 721,554 $ 0 $ (788,619) $ (597)
Balance (in shares) at Dec. 31, 2017   328,857        
Issuance of common stock and warrants for cash in a registered direct offering 700 $ 4 696 0 0 0
Issuance of common stock and warrants for cash in a registered direct offering (in shares)   4,000        
Issuance of common stock for conversion of Series A convertible preferred stock 18,929 $ 100 18,938 (109) 0 0
Issuance of common stock for conversion of Series A convertible preferred stock (in shares)   100,141        
Deemed dividend on conversion of Series A convertible preferred stock to common stock (10,892) $ 0 (10,892) 0 0 0
Beneficial conversion feature of Series B convertible preferred stock 2,086 0 2,086 0 0 0
Deemed dividend related to immediate accretion of beneficial conversion feature of Series B convertible preferred stock (2,086) 0 (2,086) 0 0 0
Issuance of common stock for conversion of Series B convertible preferred stock 19,697 $ 33 19,674 (10) 0 0
Issuance of common stock for conversion of Series B convertible preferred stock (in shares)   32,491        
Deemed dividend on conversion of Series B convertible preferred stock to common stock (4,787) $ 0 (4,787) 0 0 0
Warrants exercised for cash 2,119 $ 9 2,110 0 0 0
Warrants exercised for cash (in shares)   8,957        
Reclassification of warrant liabilities related to warrants exercised for cash 2,177 $ 0 2,177 0 0 0
Conversion of share settled debt into common stock 2,453 $ 13 2,440 0 0 0
Conversion of share settled debt into common stock (in shares)   13,300        
Issuance of common stock and warrants for conversion of debt and accrued interest 5,522 $ 22 5,500 0 0 0
Issuance of common stock and warrants for conversion of debt and accrued interest (in shares)   22,268        
Reclass between accrued interest and subscription receivable 9 $ 0 0 9 0 0
Proceeds from investor to offset subscription receivable 100 0 0 100 0 0
Stock-based compensation 13,329 $ 0 13,329 0 0 0
Stock-based compensation (in shares)   100        
Net loss (30,144) $ 0 0 0 (30,144) 0
Cumulative translation adjustment 982 0 0 0 0 982
Balance at Sep. 30, 2018 $ (47,139) $ 510 $ 770,739 $ (10) $ (818,763) $ 385
Balance (in shares) at Sep. 30, 2018   510,114