Stockholders' Equity - Summary of Warrant Activity (Details) - Warrants - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Class Of Warrant Or Right [Line Items]
Number of Shares, Outstanding at beginning of period	317,630
Number of Shares, Options Caneled/forfeited	(5,204)
Number of Shares, Outstanding at end of period	312,426	317,630
Weighted Average Exercise Price, Warrants
Weighted Average Exercise Price, Outstanding at beginning of period	$ 123.61
Weighted Average Exercise Price, Options Canceled/forfeited	84.25
Weighted Average Exercise Price, Outstanding at end of period	$ 124.27	$ 123.61
Weighted Average Remaining Contract Term, Warrants
Weighted Average Remaining Contract Term, Outstanding at beginning of period		6 months 14 days
Weighted Average Remaining Contract Term, Outstanding at end of period	7 days
Intrinsic Value, Warrants
Intrinsic Value, Outstanding at beginning of period	$ 0
Intrinsic Value, Outstanding at end of period		$ 0
Intrinsic Value, Exercisable at end of period	$ 0