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Stock Based Compensation - Summary of Non-vested Stock Options Outstanding (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]      
Non-vested at beginning of period 519,644 249,144  
Number of Shares Forfeited (2,750) (10,000)  
Non-vested at end of period 516,894 519,644 249,144
Fully vested and expected to vest 159,430 79,715  
Exercisable at end of period 159,430 79,715  
Weighted Average Exercise Price at beginning of period $ 8.72 $ 8.06  
Weighted Average Exercise Price Forfeited 9.29 8.06  
Weighted Average Exercise Price at end of period 8.72 8.72 $ 8.06
Weighted Average Exercise Price Fully vested and expected to vest 8.06 8.06  
Weighted Average Exercise Price Exercisable at end of period $ 8.06 $ 8.06  
Weighted Average Remaining Contractual Term 8 years 8 years 10 months 24 days 9 years 4 months 24 days
Weighted Average Remaining Contractual Term Fully vested and expected to vest 7 years 6 months 8 years 4 months 24 days  
Weighted Average Remaining Contractual Term Exercisable at end of period 7 years 6 months 8 years 4 months 24 days  
Aggregate Intrinsic Value $ 1,437 $ 684  
Aggregate Intrinsic Value Fully vested and expected to vest 548 158  
Aggregate Intrinsic Value Exercisable at end of period $ 548 $ 158  
Date of grant May 25, 2023 Dec. 02, 2024  
Options granted 249,144 280,500  
Exercise price $ 8.06 $ 9.29  
Vesting period 3 years 3 years  
Expiration date May 25, 2033 Dec. 02, 2034  
Expected volatility 27.80% 31.50%  
Expected term 6 years 6 months 6 years 6 months  
Expected dividend yield 0.00% 0.00%  
Expected forfeiture rate 0.00% 0.00%  
Risk free interest rate 3.90% 4.10%  
Fair value per option $ 3 $ 3.78