Share Based Payments - Schedule of Fair Value of Non-Employee Liability Classified Award Estimated Using Black-Scholes Option Pricing Model With Following Weighted Average Assumptions (Details) - Non-employee Liability - $ / shares	9 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock price	$ 9.60	$ 15.95
Exercise price	$ 6.15	$ 4.30
Expected term	2 years 7 months 2 days	1 year 6 months 3 days
Expected volatility	87.61%	61.58%
Risk-free interest rate	0.79%	1.61%
Dividend rate	0.00%	0.00%