Share Capital (Details) - USD ($)		1 Months Ended	12 Months Ended
	Nov. 10, 2014	Jan. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Preferred Stock, Shares Outstanding	0
Number of Options Exercisable			1,034,576
Options Exercisable Weighted Average Remaining Contractual Life in Years			4 years 3 months 26 days
Aggregate fair value of options vested			$ 999,000	$ 722,000	$ 374,000
Unrecognized stock-based compensation cost			$ 4,650,000
Unrecognized stock-based compensation expected to be recognized over a period			3 years
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options exercise term			10 years
Options vesting period			4 years
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			4,742
Two Thousand Fourteen Plan [Member] | Subsequent Event [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance		375,000
Converted from Convertible Preferred Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock issued upon conversion of preferred stock	7,725,924
Converted from Subscription Rights [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock issued upon conversion of subscription rights	10,201
Series A Preferred Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Convertible Preferred Stock, Shares Issued upon Conversion			converted into common shares on a 1:1 basis
Preferred Stock, Shares Outstanding				0
Preferred Stock, Shares Authorized			1,205,761
Preferred Stock, Dividend Rate			8.00%
Dividends Declared Prior to Conversion			$ 0
Series B Preferred Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Convertible Preferred Stock, Shares Issued upon Conversion			converted into common shares on a 1:1 basis
Preferred Stock, Shares Outstanding				0
Preferred Stock, Shares Authorized			1,028,806
Preferred Stock, Dividend Rate			8.00%
Dividends Declared Prior to Conversion			$ 0
Series E Preferred Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Convertible Preferred Stock, Shares Issued upon Conversion			converted into common shares on a 1:1.2 basis
Preferred Stock, Shares Outstanding				0
Preferred Stock, Shares Authorized			4,370,920
Preferred Stock, Dividend Rate			8.00%
Dividends Declared Prior to Conversion			$ 0
Series C Preferred Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Preferred Stock, Shares Outstanding			0	0
Preferred Stock, Shares Authorized			4,620
Series D Preferred Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Preferred Stock, Shares Outstanding			0	0
Preferred Stock, Shares Authorized			9,376
Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common shares, net of issuance costs (in Shares)				5,095,000
Common stock issued upon conversion of preferred stock				7,725,924
Common stock issued upon conversion of subscription rights	10,201
IPO [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common shares, net of issuance costs (in Shares)	4,600,000
Share Price (in Dollars per share)	$ 9.00
Proceeds from net of underwriting discounts and commissions Before offering expenses	$ 38,500,000
Private Placement [Member] | Common Stock [Member] | Genentech Affiliate [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common shares, net of issuance costs (in Shares)	495,000
Share Price (in Dollars per share)	$ 9.00
Concurrent Private Placement [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Proceeds from net of underwriting discounts and commissions Before offering expenses	$ 4,100,000