Capital Stock - Reserved for Future Issuance (Details) - shares	Jun. 30, 2020	Dec. 31, 2019	Apr. 16, 2019
Common stock reserved for future issuance
Total	3,484,491
2019 Equity Incentive Plan
Common stock reserved for future issuance
Shares authorized for future issuance	2,014,900		2,400,000
2019 Employee Stock Purchase Plan
Common stock reserved for future issuance
Shares authorized for future issuance	458,889		240,000
Stock Options
Common stock reserved for future issuance
Stock options outstanding	1,008,907	1,046,373
Stock Options | 2019 Equity Incentive Plan
Common stock reserved for future issuance
Stock options outstanding	1,008,907
Restricted Stock Units | 2019 Equity Incentive Plan
Common stock reserved for future issuance
Restricted stock units outstanding	1,795