Share Capital - Additional Information (Details)	3 Months Ended
	Mar. 31, 2018 $ / shares shares
Share Capital [Line Items]
The Number of ordinary shares that originally could be purchased by exercise of warrants	201,692
Warrants exercise price | $ / shares	$ 3.59
Options exercised	500,166
Ordinary shares issued upon option exercise	495,530
Warrant
Share Capital [Line Items]
The Number of ordinary shares that originally could be purchased by exercise of warrants in cash	1,549
Warrant | Warrants Not Settleable in Cash
Share Capital [Line Items]
Number of shares issued upon the exercise of warrants	167,212