Subsequent Events (Details) - shares	Apr. 09, 2018	Mar. 31, 2018	Jan. 01, 2018
Subsequent Event
Subsequent Event [Line Items]
Stock options outstanding	450,000
A&R 2015 Plan
Subsequent Event [Line Items]
Stock options outstanding		2,926,227	2,815,077
A&R 2015 Plan | Subsequent Event
Subsequent Event [Line Items]
Granted (in shares)	300,000
Inducement Plan | Subsequent Event
Subsequent Event [Line Items]
Granted (in shares)	150,000