Share Capital - Additional Information (Details)	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Share Capital [Line Items]
The Number of ordinary shares that originally could be purchased by exercise of warrants	1,418,711
Warrants exercise price | $ / shares	$ 3.59
Options exercised	1,370,810
Ordinary shares issued upon option exercise	1,364,645
Warrant
Share Capital [Line Items]
The Number of ordinary shares that originally could be purchased by exercise of warrants in cash	6,498
Warrant | Warrants Not Settleable in Cash
Share Capital [Line Items]
Number of shares issued upon the exercise of warrants	803,138