Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation - Additional Information (Detail)

v3.23.3
Equity-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 08, 2022
Apr. 30, 2023
Nov. 30, 2022
May 31, 2022
Aug. 31, 2021
May 31, 2021
Jan. 31, 2021
May 31, 2020
Mar. 31, 2020
May 31, 2019
Oct. 31, 2018
Jan. 31, 2018
May 31, 2016
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Nov. 02, 2012
Class A Common Stock                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units granted                               0 10,270    
Class B Common Stock                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units granted                               264,037      
Non-Qualified Stock Options                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units granted               86,764   60,742 105,398                
Restricted stock units\non-qualified stock options, granted description                       One third of the NQOs will vest and become exercisable on each of the first, second and third anniversaries of the grant date.       One third of the NQOs will vest and become exercisable on each of the first, second and third anniversaries of the grant date.      
Fair value assumptions, strike price               $ 10.18   $ 14.54 $ 13.97                
Fair value assumptions, risk free rate               0.64%   2.32% 2.94%                
Fair value assumptions, expiration               10 years   5 years 5 years                
Fair value assumptions, volatility               48.00%   34.20% 32.70%                
Compensation expense forfeiture rate               1.00%   1.00% 1.00%                
Compensation expense                           $ 354 $ 285 $ 1,047 $ 789    
Recognition period of unrecognized compensation expense related to unvested awards                               1 year 8 months 8 days   11 months 1 day  
Unrecognized compensation expense related to unvested awards                           $ 3,730   $ 3,730   $ 2,860  
Restricted Stock Units                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units granted                               101,192 10,270    
2012 Equity Incentive Plan                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Shares reserved for issuance, authorized 2,737,500                                   1,687,500
Increase in the number of shares issuable 1,050,000                                    
Shares reserved for issuance                           1,122,400   1,122,400      
Restricted stock units granted                         3,791            
Fair Value per unit                         $ 13.19            
Restricted stock units\non-qualified stock options, granted description                               Twenty-five percent of the RSUs granted vested and settled on each of the first, second, third and fourth anniversaries of the grant date.      
2012 Equity Incentive Plan | Non-Qualified Stock Options | Class B Common Stock                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Shares reserved for issuance                           83,328   83,328      
Number of shares issued for equity incentive plan                               22,070      
2012 Equity Incentive Plan | Employee                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units granted           116,823 21,598 49,116   34,388     7,582            
Fair Value per unit           $ 13.91 $ 13.89 $ 10.11   $ 14.54     $ 13.19            
Restricted stock units\non-qualified stock options, granted description                               Twenty-five percent of the RSUs granted vested and settled on each of the first, second, third and fourth anniversaries of the grant date.      
2012 Equity Incentive Plan | Employee | Class A Common Stock                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units granted       10,270 1,827 856                          
Fair Value per unit       $ 21.42 $ 15.96 $ 14.61                          
2012 Equity Incentive Plan | Employee | Restricted Stock Units                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units\non-qualified stock options, granted description                               Twenty-five percent of the RSUs granted vest and settle on each of the first, second, third and fourth anniversaries of the grant date.      
2012 Equity Incentive Plan | Employee | Restricted Stock Units | Class A Common Stock                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units\non-qualified stock options, granted description       The RSUs vest and settle on the third anniversary of the grant date. The RSUs vest and settle on the third anniversary of the grant date                            
2012 Equity Incentive Plan | Employee | Restricted Stock Units | Class B Common Stock                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units granted   101,192 92,154                                
Fair Value per unit   $ 18.18 $ 18.99                                
Restricted stock units\non-qualified stock options, granted description   Twenty-five percent of the RSUs granted vest and settle on each of the first, second, third and fourth anniversaries of the grant date. Twenty-five percent of the RSUs granted vest and settle on each of the first, second, third and fourth anniversaries of the grant date.                                
2012 Equity Incentive Plan | Board of Directors                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units granted                 8,242       3,000            
Fair Value per unit                 $ 11.83       $ 13.19            
Restricted stock units\non-qualified stock options, granted description                               One hundred percent of the RSUs granted vested and settled on the first anniversary of the grant date.      
2012 Equity Incentive Plan | Board of Directors | Restricted Stock Units                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units\non-qualified stock options, granted description                               All of the RSUs granted vest on the third anniversary of the grant date      
2012 Equity Incentive Plan | First Anniversary | Employee                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock, vesting percentage                               25.00%      
2012 Equity Incentive Plan | First Anniversary | Board of Directors                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock, vesting percentage                 0.33%       100.00%            
2012 Equity Incentive Plan | Second Anniversary | Board of Directors                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock, vesting percentage                 0.33%                    
2012 Equity Incentive Plan | Third Anniversary | Board of Directors                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock, vesting percentage                 0.33%                    
2012 Equity Incentive Plan | Fourth Anniversary                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock, vesting percentage                         25.00%            
2012 Equity Incentive Plan | Fourth Anniversary | Employee                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock, vesting percentage     25.00%     25.00%   25.00%         25.00%            
2012 Equity Incentive Plan | Fourth Anniversary | Board of Directors                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock, vesting percentage                 0.33%                    
2012 Equity Incentive Plan | Three Year Annual Vesting Period | Employee | Class A Common Stock                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units granted           11,635                          
Fair Value per unit           $ 14.61                          
2012 Equity Incentive Plan | Three Year Annual Vesting Period | Employee | Restricted Stock Units | Class A Common Stock                                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                      
Restricted stock units\non-qualified stock options, granted description                               One third of the RSUs granted vest and settle on each of the first, second and third anniversaries of the grant date.