Stock Based Compensation - Summary of Stock Options Outstanding (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of stock options outstanding, Beginning of period	110,828	326,424
Number of stock options outstanding, Granted	189,164
Number of stock options outstanding, Expired	(13,818)	(210,872)
Number of stock options outstanding, Cancelled or forfeited		(4,724)
Number of stock options outstanding, End of period	286,174	110,828
Number of stock options outstanding, Exercisable	97,010	110,723
Weighted average exercise price, Beginning of period	$ 18.24	$ 24.89
Weighted average exercise price, Granted	1.40
Weighted average exercise price, Expired	50.88	19.13
Weighted average exercise price, Cancelled or forfeited		438.89
Weighted average exercise price, End of period	5.53	18.24
Weighted average exercise price, Exercisable	$ 13.59	$ 18.22