Share-based Compensation - Summary of Stock Option Activities (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Number of Stock Options
Options outstanding beginning of period	152,584	120,433
Number of Options, Granted	21,492	32,644
Number of Options, Forfeited and cancelled	(12,798)	(493)
Options outstanding end of the period	161,278	152,584
Options exercisable, end of period, Number of Options	114,198
Options vested and expected to vest, Number of Options	161,102
Stock Options, Weighted Average Exercise Price
Weighted Average exercise Price, Options Outstanding, Beginning of period	$ 20.20	$ 25.72
Weighted average exercise price, Granted	4.92	12.64
Weighted average exercise price, Forfeited and cancelled	18.45	867.70
Weighted Average exercise Price, Options Outstanding, end of period	18.30	$ 20.20
Weighted average exercise price, Options exercisable, end of period	21.55
Weighted Average exercise Price, Options vested and expected to vest, end of period	$ 18.31
Stock Options, Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term (in years) Options Outstanding	6 years 11 months 19 days	8 years 3 months
Options exercisable, Weighted Average Remaining Contractual Term (in years)	6 years 5 months 9 days
Options vested and expected to vest, Weighted Average Remaining Contractual Term (in years)	6 years 11 months 19 days