Quarterly report pursuant to Section 13 or 15(d)

Equity (Details)

v3.21.1
Equity (Details)
 1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2021
USD ($)
voting_rights
$ / shares
shares
Mar. 31, 2021
voting_rights
$ / shares
shares
Dec. 31, 2019
shares
Mar. 31, 2021
voting_rights
$ / shares
shares
Secondary Offering        
Schedule Of Stockholders Equity [Line Items]        
Number of shares issued in transaction (in shares) 2,000,000      
Sale of stock, price per share (usd per share) | $ / shares $ 31.25 $ 31.25   $ 31.25
Sale of Stock, Consideration Received on Transaction | $ $ 0      
Payments of stock issuance costs | $ $ 200,000      
Class A Common Stock        
Schedule Of Stockholders Equity [Line Items]        
Voting rights per share | voting_rights 1 1   1
Class A Common Stock | Restricted Stock | Equity Incentive Plan        
Schedule Of Stockholders Equity [Line Items]        
Options granted (in shares)   510,733    
Class A Common Stock | Common Stock        
Schedule Of Stockholders Equity [Line Items]        
Converted shares (in shares)   1,332,952 107,682  
Stock split, conversion ratio       1
Outstanding shares (in shares) 35,719,569 35,719,569   35,719,569
Options granted (in shares)   510,733    
Class B Common Stock        
Schedule Of Stockholders Equity [Line Items]        
Voting rights per share | voting_rights 10 10   10
Class B Common Stock | Common Stock        
Schedule Of Stockholders Equity [Line Items]        
Converted shares (in shares)   (1,332,952) (107,682)  
Outstanding shares (in shares) 16,572,909 16,572,909   16,572,909