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Condensed Consolidated Statements Of Stockholders' Deficit - 6 months ended Jun. 30, 2016 - USD ($)
$ in Thousands
Total
Preferred Shares
Common Shares
Treasury Stock
Additional Paid-in Capital
Accumulated Deficit
Cumulative-effect adjustment | ASU No. 2016-09 $ 1,639         $ 1,639
Beginning Balance (in shares) (Scenario, Previously Reported) at Dec. 31, 2015   328,184,640 183,577,765 (174,502)    
Beginning Balance (in shares) at Dec. 31, 2015   328,184,640 183,577,765 (174,502)    
Beginning Balance (Scenario, Previously Reported) at Dec. 31, 2015 (129,191) $ 24,364 $ 149,978 $ (411) $ 816,171 (1,119,293)
Beginning Balance at Dec. 31, 2015 $ (127,552) $ 24,364 $ 149,978 $ (411) 816,171 (1,117,654)
Exercise of stock options (in shares) 83,020   83,020      
Exercise of stock options $ 124   $ 60   64  
Vesting of restricted stock units (in shares)     1,613,726 (548,845)    
Vesting of restricted stock units (793)   $ 1,145 $ (786) (1,152)  
Stock-based compensation 6,930       6,930  
Loss for the period (43,125)         (43,125)
Ending Balance (in shares) at Jun. 30, 2016   328,184,640 185,274,511 (723,347)    
Ending Balance at Jun. 30, 2016 $ (164,416) $ 24,364 $ 151,183 $ (1,197) $ 822,013 $ (1,160,779)