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Stock-Based Compensation - Summary of Stock Options Outstanding (Details) - $ / shares
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Number of stock options outstanding, Beginning of period 13,388 25,781
Number of stock options outstanding, Granted 314,086
Number of stock options outstanding, Expired (1,075) (11,227)
Number of stock options outstanding, Canceled or forfeited (1,166)
Number of stock options outstanding, End of period 326,399 13,388
Number of stock options outstanding, Exercisable 316,005 9,611
Weighted average exercise price, Beginning of period $ 302.16 $ 237.00
Weighted average exercise price, Granted 14.21
Weighted average exercise price, Expired $ 356.93 $ 144.84
Weighted average exercise price, Canceled or forfeited 375.72
Weighted average exercise price, End of period $ 24.89 302.16
Weighted average exercise price, Exercisable $ 25.16 $ 405.72