Capital Stock - Schedule of Common Stock Reserved for Future Issuance (Details)	Dec. 31, 2018 shares
Class Of Stock [Line Items]
Common stock reserved for future issuance	2,343,087
Options Outstanding
Class Of Stock [Line Items]
Common stock reserved for future issuance	820,186
Shares Available for Future Grant
Class Of Stock [Line Items]
Common stock reserved for future issuance	1,248,424
Unvested Restricted Stock Units
Class Of Stock [Line Items]
Common stock reserved for future issuance	110,764
Warrants to Purchase Common Stock
Class Of Stock [Line Items]
Common stock reserved for future issuance	163,713