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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Stockholders' equity    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 10,000,000 10,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 170,000,000 170,000,000
Common stock, shares issued (in shares) 9,433,703 8,394,397
Common stock, shares outstanding (in shares) 9,431,907 8,392,641
Treasury stock, at cost (in shares) 1,757 1,757
Reverse stock split ratio one-for-sixteen (1:16) one-for-sixteen (1:16)