Net Loss per Share - Antidilutive Securities Excluded from EPS (Details) - shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Securities excluded from computation of diluted net loss per share
Anti-dilutive securities excluded from calculation of diluted net loss per share	5,160,344	3,522,500
Options to purchase common shares | Common Shares
Securities excluded from computation of diluted net loss per share
Anti-dilutive securities excluded from calculation of diluted net loss per share	4,345,344	3,247,500
Warrants to purchase common shares
Securities excluded from computation of diluted net loss per share
Anti-dilutive securities excluded from calculation of diluted net loss per share	815,000	275,000