v3.26.1
FAIR VALUE MEASUREMENTS - Assets measured at fair value on a recurring basis (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
FAIR VALUE MEASUREMENTS    
Available-for-sale debt securities $ 5,399,403 $ 5,538,692
U.S. government agencies    
FAIR VALUE MEASUREMENTS    
Available-for-sale debt securities 1,424,337 1,437,836
Municipal securities    
FAIR VALUE MEASUREMENTS    
Available-for-sale debt securities 2,834,644 2,836,036
Recurring    
FAIR VALUE MEASUREMENTS    
Available-for-sale debt securities 5,399,403 5,538,692
Total Fair Value Measurements 5,399,403 5,538,692
Recurring | U.S. government agencies    
FAIR VALUE MEASUREMENTS    
Available-for-sale debt securities 1,424,337 1,437,836
Recurring | Mortgage-backed securities and collateralized mortgage obligation bonds    
FAIR VALUE MEASUREMENTS    
Available-for-sale debt securities 1,140,422 1,264,820
Recurring | Municipal securities    
FAIR VALUE MEASUREMENTS    
Available-for-sale debt securities 2,834,644 2,836,036
Recurring | Level 2    
FAIR VALUE MEASUREMENTS    
Available-for-sale debt securities 5,399,403 5,538,692
Total Fair Value Measurements 5,399,403 5,538,692
Recurring | Level 2 | U.S. government agencies    
FAIR VALUE MEASUREMENTS    
Available-for-sale debt securities 1,424,337 1,437,836
Recurring | Level 2 | Mortgage-backed securities and collateralized mortgage obligation bonds    
FAIR VALUE MEASUREMENTS    
Available-for-sale debt securities 1,140,422 1,264,820
Recurring | Level 2 | Municipal securities    
FAIR VALUE MEASUREMENTS    
Available-for-sale debt securities $ 2,834,644 $ 2,836,036