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Debt Securities - Continuous unrealized loss position (Details) - USD ($)
Jun. 30, 2022
Jun. 30, 2021
Debt Securities, Available-for-sale, Unrealized losses    
Less than 12 months $ (407,241) $ (33,460)
Over 12 months (82,052) (12,112)
Total gross unrealized losses (489,293) (45,572)
Debt Securities, Available-for-sale, Fair value    
Less than 12 months 8,901,446 1,261,843
Over 12 months 1,179,360 250,438
Fair value 10,080,806 1,512,281
States and municipalities    
Debt Securities, Available-for-sale, Unrealized losses    
Less than 12 months (6,144)  
Over 12 months (1,379) (3,999)
Total gross unrealized losses (7,523) (3,999)
Debt Securities, Available-for-sale, Fair value    
Less than 12 months 688,504  
Over 12 months 58,621 91,001
Fair value 747,125 91,001
Mortgage-backed    
Debt Securities, Available-for-sale, Unrealized losses    
Less than 12 months (98,106) (3,760)
Over 12 months (15,575) (8,113)
Total gross unrealized losses (113,681) (11,873)
Debt Securities, Available-for-sale, Fair value    
Less than 12 months 2,421,426 181,380
Over 12 months 101,977 159,437
Fair value 2,523,403 340,817
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 months (113,363)  
Total gross unrealized losses (113,363)  
Debt Securities, Held-to-maturity, Fair value    
Less than 12 months 419,000  
Fair value 419,000  
Corporate bonds    
Debt Securities, Available-for-sale, Unrealized losses    
Less than 12 months (302,991) (29,700)
Over 12 months (65,098)  
Total gross unrealized losses (368,089) (29,700)
Debt Securities, Available-for-sale, Fair value    
Less than 12 months 5,791,516 1,080,463
Over 12 months 1,018,762  
Fair value $ 6,810,278 $ 1,080,463