Stock Based Compensation - Summary of Status of Non-vested Restricted Shares (Details) - Restricted Stock Units [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Number of restricted stock, Unvested Beginning of period	8,649	32,699
Number of restricted stock, Granted	304,064
Number of restricted stock, Forfeited	(34,845)	(7,627)
Number of restricted stock, Vested	(98,971)	(16,423)
Number of restricted stock, Unvested End of period	178,897	8,649
Weighted Average Grant Date Fair Value, Unvested Beginning of period	$ 43.71	$ 34.25
Weighted Average Grant Date Fair Value, Granted	1.40
Weighted Average Grant Date Fair Value, Forfeited	5.72	34.61
Weighted Average Grant Date Fair Value, Vested	2.50	29.09
Weighted Average Grant Date Fair Value, Unvested End of period	$ 1.40	$ 43.71