Share-Based Compensation - Share-Based Payment Award Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, January 1, 2015 (shares)	407,950
Granted (shares)	255,914
Exercised (shares)	(16,878)
Canceled, forfeited or adjusted (shares)	(183,073)
Outstanding, December 31, 2015 (shares)	463,913	407,950
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, January 1, 2015, weighted average exercise price (usd per share)	$ 22.12
Granted, weighted average exercise price (usd per share)	10.46
Exercised, weighted average exercise price (usd per share)	11.27
Canceled, forfeited or adjusted, weighted average exercise price (usd per share)	23.84
Outstanding, December 31, 2015, weighted average exercise price (usd per share)	$ 15.10	$ 22.12
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average remaining contractual term	7 years 11 months 16 days
Outstanding, aggregate intrinsic value	$ 614,591
Vested and expected to vest (shares)	407,713
Vested and expected to vest, weighted average exercise price (usd per share)	$ 15.67
Vested and expected to vest, weighted average remaining contractual term	7 years 9 months 11 days
Vested and expected to vest, aggregate intrinsic value	$ 516,599
Exercisable (shares)	151,858
Exercisable, weighted average exercise price (usd per share)	$ 23.23
Exercisable, weighted average remaining contractual term	5 years 6 months 18 days
Exercisable, aggregate intrinsic value, per share	$ 97,866
Total intrinsic value of stock options exercised	42,000	$ 17,000	$ 0
Cash received from stock options exercised	$ 190,000	$ 72,000	$ 0