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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 20, 2019
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]            
Offering expenses $ 4,200,000          
Conversion from convertible warrants 188,643          
Warrant outstanding   62,096   62,096    
Allowance for doubtful accounts   $ 100,000   $ 100,000   $ 100,000
Bad debt expense   $ 0 $ 0      
Dividend yield   0.00% 0.00% 0.00% 0.00%  
Dividends       $ 0    
Minimum | ASU 2014-09            
Summary Of Significant Accounting Policies [Line Items]            
Standard payment terms       90 days    
Maximum | ASU 2014-09            
Summary Of Significant Accounting Policies [Line Items]            
Period between payment by customer and transfer of promised services       1 year    
Recognition period of incremental costs       1 year    
Common Stock            
Summary Of Significant Accounting Policies [Line Items]            
Number of shares issued     9,109,725   9,109,725  
Conversion from convertible preferred stock     18,474,703   18,474,703  
IPO            
Summary Of Significant Accounting Policies [Line Items]            
Number of shares issued 9,109,725          
Shares issued price per share $ 17.00          
Proceeds from issuance of common stock after deducting underwriting discounts, commissions and offering expenses upon completion of initial public offering $ 139,800,000          
Conversion from convertible preferred stock 18,474,703          
IPO | Common Stock            
Summary Of Significant Accounting Policies [Line Items]            
Warrant outstanding   62,096   62,096    
IPO | Convertible Preferred Stock            
Summary Of Significant Accounting Policies [Line Items]            
Conversion from convertible warrants to purchase common stock 84,585