Loans and Allowance for Loan Losses - Risk rating (Details) - USD ($)	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 227,708,066	$ 238,653,905	$ 246,549,421
Construction, Land, Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,095,640	4,598,382	4,762,278
1-4 Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	77,969,235	100,506,311	109,212,203
1-4 Family Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	22,195,303	21,213,680	20,098,726
Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total Loans	91,898,930	76,444,156	78,150,768
Commercial Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,355,215	6,733,183	6,843,419
Commercial Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	19,458,183	20,237,534	18,744,604
Consumer and Installment Loan
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7,735,560	8,920,659	$ 8,737,423
1-4
Financing Receivable, Recorded Investment [Line Items]
Total Loans	217,799,244	229,193,196
1-4 | Construction, Land, Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,095,640	4,598,382
1-4 | 1-4 Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	77,270,159	99,344,653
1-4 | 1-4 Family Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	22,116,038	21,156,106
1-4 | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total Loans	91,898,930	76,444,156
1-4 | Commercial Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,014,486	6,543,934
1-4 | Commercial Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	11,768,042	12,313,923
1-4 | Consumer and Installment Loan
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7,635,949	8,792,042
5
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,952,734	8,119,535
5 | Construction, Land, Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
5 | 1-4 Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	104,717	195,924
5 | 1-4 Family Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
5 | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
5 | Commercial Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,157,876	0
5 | Commercial Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7,690,141	7,923,611
5 | Consumer and Installment Loan
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
6
Financing Receivable, Recorded Investment [Line Items]
Total Loans	882,919	1,150,479
6 | Construction, Land, Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
6 | 1-4 Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	594,359	851,208
6 | 1-4 Family Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	79,265	57,574
6 | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
6 | Commercial Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	182,853	189,249
6 | Commercial Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
6 | Consumer and Installment Loan
Financing Receivable, Recorded Investment [Line Items]
Total Loans	26,442	52,448
7
Financing Receivable, Recorded Investment [Line Items]
Total Loans	73,169	190,695
7 | Construction, Land, Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
7 | 1-4 Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	114,526
7 | 1-4 Family Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
7 | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
7 | Commercial Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
7 | Commercial Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
7 | Consumer and Installment Loan
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 73,169	$ 76,169