Loans and Allowance for Loan Losses - Changes In Allowance (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	$ 1,262,472	$ 1,295,012	$ 1,293,965	$ 1,324,159	$ 1,324,159
Charge-offs	(44,038)	(13,599)	(102,722)	(60,343)	(60,343)
Recoveries		6,627	27,191	24,224	30,149
Provision	85,000		85,000	0
Balance at Ending	1,303,434	1,288,040	1,303,434	1,288,040	1,293,965
Allowance
Ending balance individually evaluated for impairment						$ 200,793	$ 103,315	$ 107,490
Ending balance collectively evaluated for impairment						1,102,641	1,190,650	1,180,550
Ending balance						1,303,434	1,293,965	1,288,040
Loans
Ending balance individually evaluated for impairment						1,267,622	1,524,868	1,290,301
Ending balance collectively evaluated for impairment						245,281,799	259,642,500	261,235,502
Total loans						246,549,421	261,167,368	262,525,803
Less allowance	1,303,434	1,288,040	1,303,434	1,288,040	1,293,965	1,303,434	1,293,965	1,288,040
Total						245,245,987	259,873,403	261,237,763
Construction, Land, Development
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	10,863	3,220	4,319	4,758	4,758
Provision	3,424	97	9,968	(1,441)	(439)
Balance at Ending	14,287	3,317	14,287	3,317	4,319
Allowance
Ending balance collectively evaluated for impairment						14,287	4,319	3,317
Ending balance						14,287	4,319	3,317
Loans
Ending balance collectively evaluated for impairment						4,762,278	4,318,845	3,316,605
Total loans						4,762,278	4,318,845	3,316,605
Less allowance	14,287	3,317	14,287	3,317	4,319	14,287	4,319	3,317
Total						4,747,991	4,314,526	3,313,288
1-4 Family Owner Occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	99,975	25,850	67,593	7,300	7,300
Charge-offs	(38,726)		(57,572)
Recoveries		6,327	5,155	23,110	28,735
Provision	337,855	34,416	383,928	36,183	31,558
Balance at Ending	399,104	66,593	399,104	66,593	67,593
Allowance
Ending balance individually evaluated for impairment						59,000	5,772	5,325
Ending balance collectively evaluated for impairment						340,104	61,821	61,268
Ending balance						399,104	67,593	66,593
Loans
Ending balance individually evaluated for impairment						898,895	1,203,256	970,145
Ending balance collectively evaluated for impairment						108,313,308	123,642,066	122,535,797
Total loans						109,212,203	124,845,322	123,505,942
Less allowance	399,104	66,593	399,104	66,593	67,593	399,104	67,593	66,593
Total						108,813,099	124,777,729	123,439,349
1-4 Family Non-Owner Occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	22,168	28,534	26,630	71,053	71,053
Charge-offs				(44,534)	(44,534)
Provision	50,991	(2,035)	46,529	(20)	111
Balance at Ending	73,159	26,499	73,159	26,499	26,630
Allowance
Ending balance collectively evaluated for impairment						73,159	26,630	26,499
Ending balance						73,159	26,630	26,499
Loans
Ending balance collectively evaluated for impairment						20,098,726	20,968,812	21,031,234
Total loans						20,098,726	20,968,812	21,031,234
Less allowance	73,159	26,499	73,159	26,499	26,630	73,159	26,630	26,499
Total						20,025,567	20,942,182	21,004,735
Multifamily
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	116,900	111,104	109,870	71,101	71,101
Provision	195,703	923	202,733	40,926	38,769
Balance at Ending	312,603	112,027	312,603	112,027	109,870
Allowance
Ending balance collectively evaluated for impairment						312,603	109,870	112,027
Ending balance						312,603	109,870	112,027
Loans
Ending balance collectively evaluated for impairment						78,150,768	73,246,392	74,684,437
Total loans						78,150,768	73,246,392	74,684,437
Less allowance	312,603	112,027	312,603	112,027	109,870	312,603	109,870	112,027
Total						77,838,165	73,136,522	74,572,410
Commercial Owner Occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	80,090	134,288	61,193	131,906	131,906
Provision	14,054	(71,633)	32,951	(69,251)	(70,713)
Balance at Ending	94,144	62,655	94,144	62,655	61,193
Allowance
Ending balance individually evaluated for impairment						77,510	44,564	45,768
Ending balance collectively evaluated for impairment						16,634	16,629	16,887
Ending balance						94,144	61,193	62,655
Loans
Ending balance individually evaluated for impairment						189,702	193,601	196,135
Ending balance collectively evaluated for impairment						6,653,717	8,314,410	8,443,494
Total loans						6,843,419	8,508,011	8,639,629
Less allowance	94,144	62,655	94,144	62,655	61,193	94,144	61,193	62,655
Total						6,749,275	8,446,818	8,576,974
Commercial Non-Owner Occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	809,722	881,797	738,366	925,355	925,355
Provision	(542,611)	(126,924)	(471,255)	(170,482)	(186,989)
Balance at Ending	267,111	754,873	267,111	754,873	738,366
Allowance
Ending balance collectively evaluated for impairment						267,111	738,366	754,873
Ending balance						267,111	738,366	754,873
Loans
Ending balance collectively evaluated for impairment						18,744,604	19,502,545	20,904,832
Total loans						18,744,604	19,502,545	20,904,832
Less allowance	267,111	754,873	267,111	754,873	738,366	267,111	738,366	754,873
Total						18,477,493	18,764,179	20,149,959
Consumer and Installment Loan
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	86,014	107,708	70,058	98,096	98,096
Charge-offs	(5,312)	(13,599)	(45,150)	(15,809)	(15,809)
Recoveries		300	22,036	1,114	1,414
Provision	17,729	(25,526)	51,487	(14,518)	(13,643)
Balance at Ending	98,431	68,883	98,431	68,883	70,058
Allowance
Ending balance individually evaluated for impairment						64,283	52,979	56,397
Ending balance collectively evaluated for impairment						34,148	17,079	12,486
Ending balance						98,431	70,058	68,883
Loans
Ending balance individually evaluated for impairment						179,025	128,011	124,021
Ending balance collectively evaluated for impairment						8,558,398	9,649,430	10,319,103
Total loans						8,737,423	9,777,441	10,443,124
Less allowance	98,431	68,883	98,431	68,883	70,058	98,431	70,058	68,883
Total						8,638,992	9,707,383	10,374,241
Not Specifically Allocated
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	36,740	2,511	215,936	14,590	14,590
Provision	7,855	190,682	(171,341)	178,603	201,346
Balance at Ending	44,595	193,193	44,595	193,193	215,936
Allowance
Ending balance collectively evaluated for impairment						44,595	215,936	193,193
Ending balance						44,595	215,936	193,193
Loans
Less allowance	$ 44,595	$ 193,193	$ 44,595	$ 193,193	$ 215,936	44,595	215,936	193,193
Total						$ (44,595)	$ (215,936)	$ (193,193)