Share Capital (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	12 Months Ended
	Sep. 13, 2016	Jun. 25, 2014	Jan. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Proceeds from net of underwriting discounts and commissions Before offering expenses					$ 23,832
Number of Options Exercisable				1,439,301
Options Exercisable Weighted Average Remaining Contractual Life in Years				5 years 14 days
Aggregate fair value of options vested				$ 2,047	$ 3,220	$ 999
Unrecognized stock-based compensation cost				$ 4,251
Unrecognized stock-based compensation expected to be recognized over a period				2 years 4 months 13 days
Amended And Restated Stock Option Plan [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options exercise term				10 years
Options vesting period				4 years
Two Thousand Fourteen Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Granted				30,847
Two Thousand Fourteen Plan [Member] | Subsequent Event [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance			700,000
Two Thousand Fourteen Plan [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options exercise term		10 years
Options vesting period		4 years
Underwritten Public Offering [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common shares, net of issuance costs (in Shares)	3,450,000
Common share price (in Dollars per share)	$ 7.50
Proceeds from net of underwriting discounts and commissions Before offering expenses	$ 24,300