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Subsequent Events (Details) (7.50% Convertible Senior Secured Notes due 2019, USD $)
In Thousands, except Share data, unless otherwise specified
2 Months Ended 12 Months Ended 3 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Mar. 14, 2014
Subsequent events
Subsequent events      
Principal amount of the Notes converted $ 40,500 $ (40,492) $ 9,500
Shares of common stock issued in conversion of Notes and accrued interest thereon 7,641,060 7,600,000 1,800,000
Shares of common stock issued in settlement of the interest make-whole provision 1,337,193 1,300,000 300,000