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Capital Stock - Reserved for future issuance (Details) - shares
Sep. 30, 2019
Apr. 16, 2019
Common stock reserved for future issuance    
Total 2,640,000  
2019 Equity Incentive Plan    
Common stock reserved for future issuance    
Shares authorized for future issuance 1,408,728 2,400,000
2019 Employee Stock Purchase Plan    
Common stock reserved for future issuance    
Shares authorized for future issuance 240,000 240,000
Stock Options    
Common stock reserved for future issuance    
Stock options outstanding 985,206  
Stock Options | 2019 Equity Incentive Plan    
Common stock reserved for future issuance    
Stock options outstanding 985,206  
Restricted Stock Units | 2019 Equity Incentive Plan    
Common stock reserved for future issuance    
Restricted stock units outstanding 6,066