Available for Sale Securities - Amortized costs and fair values (Details) - USD ($)	Dec. 31, 2021	Jun. 30, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 38,812,391	$ 32,381,799
Gross Unrealized Gains	445,181	588,702
Gross Unrealized Losses	224,346	101,801
Fair Value	39,033,226	32,868,700
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	30,211,914	23,350,108
Gross Unrealized Gains	397,812	508,588
Gross Unrealized Losses	152,428	82,697
Fair Value	30,457,298	23,775,999
US government agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,642,521	5,999,632
Gross Unrealized Gains	0	15
Gross Unrealized Losses	66,622	17,669
Fair Value	5,575,899	5,981,978
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,157,784	1,229,820
Gross Unrealized Gains	22,997	45,096
Gross Unrealized Losses	0	0
Fair Value	1,180,781	1,274,916
Municipal Leases
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,000,172	1,002,239
Gross Unrealized Gains	3,714	2,185
Gross Unrealized Losses	5,296	1,435
Fair Value	998,590	1,002,989
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	800,000	800,000
Gross Unrealized Gains	20,658	32,818
Gross Unrealized Losses	0	0
Fair Value	$ 820,658	$ 832,818