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CONSOLIDATED STATEMENT OF STOCKHOLDERS' DEFICIT (Unaudited) - 3 months ended Mar. 31, 2018 - USD ($)
$ in Thousands
Total
Common Stock
Common Stock Warrants
Additional Paid-in Capital
Accumulated Deficit
Beginning Balance at Dec. 31, 2017 $ (369,272) $ 7,714 $ 3,557 $ 546,696 $ (927,239)
Beginning Balance, Shares at Dec. 31, 2017   15,428,000      
Stock-based compensation 1,601 $ 261   1,340  
Stock-based compensation, Shares   523,000      
Income tax withholdings related to equity awards $ (365) $ (26)   (339)  
Income tax withholdings related to equity awards, Shares   (53,000)      
Common stock warrants exercised   $ 130 (2,228) 2,098  
Common stock warrants exercised, Shares 260,047 260,000      
Net loss $ (41,886)       (41,886)
Ending Balance at Mar. 31, 2018 $ (409,922) $ 8,079 $ 1,329 $ 549,795 $ (969,125)
Ending Balance, Shares at Mar. 31, 2018   16,158,000