Quarterly report pursuant to Section 13 or 15(d)

Organization and Description of the Business - Additional Information (Details)

v3.20.2
Organization and Description of the Business - Additional Information (Details)
1 Months Ended 9 Months Ended
Jun. 11, 2020
USD ($)
$ / shares
shares
Feb. 04, 2020
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
$ / shares
shares
Jul. 31, 2020
shares
Sep. 30, 2020
USD ($)
Segment
$ / shares
shares
Dec. 31, 2019
USD ($)
Organization And Description Of Business [Line Items]            
Number of operating segments | Segment         1  
Accumulated deficit     $ 115,083,000   $ 115,083,000 $ 84,282,000
Pre funded warrants to purchase shares of common stock | shares 909,091 2,884,615 3,793,706   3,793,706  
Pre funded warrants exercise price | $ / shares $ 0.001 $ 0.001 $ 0.001   $ 0.001  
Underwritten Public Offering            
Organization And Description Of Business [Line Items]            
Issuance of common stock | shares 7,590,909 18,965,385   427,707    
Pre funded warrants to purchase shares of common stock | shares 909,091 2,884,615        
Pre funded warrants exercise price | $ / shares $ 0.001 $ 0.001        
Common stock, shares issued, price per share | $ / shares 5.50 2.60        
Warrant issue price per share | $ / shares $ 5.499 $ 2.599        
Net proceeds from the public offering $ 45,800,000 $ 53,400,000        
Underwritten Public Offering | Existing Stockholder, Equal Talent Investments Limited, and one of the Directors            
Organization And Description Of Business [Line Items]            
Net proceeds from the public offering $ 8,500,000          
Underwritten Public Offering | Existing Stockholder, Morningside Ventures and certain officers and directors            
Organization And Description Of Business [Line Items]            
Net proceeds from the public offering   $ 22,900,000        
ATM Agreement | Cowen and Company LLC            
Organization And Description Of Business [Line Items]            
Issuance of common stock | shares     0      
Percentage of commission on gross sales proceeds of issuance of common stock     3.00%      
Minimum            
Organization And Description Of Business [Line Items]            
Sufficient cash and cash equivalents available period term         12 months  
Maximum | ATM Agreement | Cowen and Company LLC            
Organization And Description Of Business [Line Items]            
Common stock aggregate offering price     $ 50,000,000.0