Equity-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands |
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1 Months Ended |
3 Months Ended |
9 Months Ended |
12 Months Ended |
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Jun. 08, 2022 |
May 31, 2024 |
Apr. 30, 2024 |
Sep. 30, 2023 |
May 31, 2023 |
Apr. 30, 2023 |
Nov. 30, 2022 |
May 31, 2022 |
Aug. 31, 2021 |
May 31, 2021 |
May 31, 2020 |
May 31, 2019 |
Oct. 31, 2018 |
Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2024 |
Sep. 30, 2023 |
Dec. 31, 2023 |
Nov. 02, 2012 |
| Class A Common Stock |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units granted |
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15,017
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11,822
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| Class B Common Stock |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units granted |
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228,117
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| Non-Qualified Stock Options |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units granted |
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86,764
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60,742
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105,398
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279,529
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| Restricted stock units\non-qualified stock options, granted description |
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One third of the NQOs will vest and become exercisable on each of the first, second and third anniversaries of the grant date.
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| Fair value assumptions, strike price |
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$ 10.18
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$ 14.54
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$ 13.97
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| Fair value assumptions, risk free rate |
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0.64%
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2.32%
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2.94%
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| Fair value assumptions, expiration |
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10 years
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5 years
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5 years
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| Fair value assumptions, volatility |
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48.00%
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34.20%
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32.70%
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| Compensation expense forfeiture rate |
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1.00%
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1.00%
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1.00%
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| Compensation expense |
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$ 535
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$ 354
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$ 1,374
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$ 1,047
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| Recognition period of unrecognized compensation expense related to unvested awards |
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1 year 8 months 1 day
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1 year 6 months 18 days
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| Unrecognized compensation expense related to unvested awards |
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$ 3,914
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$ 3,914
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$ 3,288
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| Restricted Stock Units |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units granted |
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68,919
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101,192
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| 2012 Equity Incentive Plan |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Shares reserved for issuance, authorized |
2,737,500
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1,687,500
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| Increase in the number of shares issuable |
1,050,000
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| Shares reserved for issuance |
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822,416
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822,416
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| 2012 Equity Incentive Plan | Non-Qualified Stock Options |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Fair value assumptions, strike price |
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$ 14.65
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| Fair value assumptions, risk free rate |
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4.63%
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| Fair value assumptions, expiration |
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10 years
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| Fair value assumptions, volatility |
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35.50%
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| Fair value assumptions, dividend |
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5.19%
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| Compensation expense forfeiture rate |
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1.00%
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| 2012 Equity Incentive Plan | Non-Qualified Stock Options | Class B Common Stock |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Shares reserved for issuance |
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60,286
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83,328
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83,328
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83,328
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| Restricted stock units granted |
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279,529
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| Number of shares issued for equity incentive plan |
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456
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22,070
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| 2012 Equity Incentive Plan | Employee |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units granted |
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116,823
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49,116
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| Fair Value per unit |
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$ 13.91
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$ 10.11
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| 2012 Equity Incentive Plan | Employee | Class A Common Stock |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units granted |
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11,822
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10,270
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1,827
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| Fair Value per unit |
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$ 18.61
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$ 21.42
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$ 15.96
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| 2012 Equity Incentive Plan | Employee | Restricted Stock Units | Class A Common Stock |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units\non-qualified stock options, granted description |
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The RSUs will vest and settle on the third anniversary of the grant date.
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The RSUs vest and settle on the third anniversary of the grant date.
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The RSUs vested and settled in August 2024
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| 2012 Equity Incentive Plan | Employee | Restricted Stock Units | Class B Common Stock |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units granted |
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53,902
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101,192
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92,154
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| Fair Value per unit |
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$ 14.65
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$ 18.18
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$ 18.99
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| Restricted stock units\non-qualified stock options, granted description |
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Twenty-five percent of the RSUs granted vest and settle on each of the first, second, third and fourth anniversaries of the grant date.
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Twenty-five percent of the RSUs granted vest and settle on each of the first, second, third and fourth anniversaries of the grant date.
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Twenty-five percent of the RSUs granted vest and settle on each of the first, second, third and fourth anniversaries of the grant date.
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| 2012 Equity Incentive Plan | First Anniversary | Employee | Class A Common Stock |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units granted |
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3,413
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| Fair Value per unit |
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$ 14.65
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| 2012 Equity Incentive Plan | First Anniversary | Employee | Restricted Stock Units | Class A Common Stock |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units\non-qualified stock options, granted description |
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The RSUs will vest and settle on the first anniversary of the grant date.
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| 2012 Equity Incentive Plan | First Anniversary | Board of Directors |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock, vesting percentage |
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0.33%
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| 2012 Equity Incentive Plan | Second Anniversary | Board of Directors |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock, vesting percentage |
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0.33%
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| 2012 Equity Incentive Plan | Third Anniversary | Employee | Class B Common Stock |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units granted |
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11,604
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| Fair Value per unit |
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$ 14.65
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| 2012 Equity Incentive Plan | Third Anniversary | Employee | Restricted Stock Units | Class B Common Stock |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units\non-qualified stock options, granted description |
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The RSUs vest and settle on the third anniversary of the grant date.
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| 2012 Equity Incentive Plan | Third Anniversary | Board of Directors |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock, vesting percentage |
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0.33%
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| 2012 Equity Incentive Plan | Fourth Anniversary | Employee |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock, vesting percentage |
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25.00%
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25.00%
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25.00%
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| 2012 Equity Incentive Plan | Fourth Anniversary | Board of Directors |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock, vesting percentage |
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0.33%
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| 2012 Equity Incentive Plan | Three Year Annual Vesting Period | Non-Qualified Stock Options |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Restricted stock units\non-qualified stock options, granted description |
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One-third of the NQOs will vest and become exercisable on each of the first, second and third anniversaries of the grant date.
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