Loans - Risk rating (Details) - USD ($)	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 261,167,368	$ 265,322,959
Construction, Land, Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,318,845	4,845,372
1-4 Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	124,845,322	122,598,962
1-4 Family Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	20,968,812	23,836,875
Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total Loans	73,246,392	71,100,731
Commercial Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,508,011	7,351,591
Commercial Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	19,502,545	24,211,269
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total Loans	9,777,441	11,378,159
1-4
Financing Receivable, Recorded Investment [Line Items]
Total Loans	251,522,291	252,535,181
1-4 | Construction, Land, Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,318,845	4,758,001
1-4 | 1-4 Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	123,642,066	121,674,827
1-4 | 1-4 Family Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	20,968,812	23,001,683
1-4 | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total Loans	73,246,392	70,755,990
1-4 | Commercial Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,314,410	7,152,762
1-4 | Commercial Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	11,382,336	13,952,614
1-4 | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total Loans	9,649,430	11,239,304
5
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,120,209	11,343,374
5 | 1-4 Family Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans		739,978
5 | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total Loans		344,741
5 | Commercial Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,120,209	10,258,655
6
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,217,054	871,407
6 | Construction, Land, Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans		87,371
6 | 1-4 Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	895,442	446,352
6 | Commercial Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	193,601	198,829
6 | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total Loans	128,011	138,855
7
Financing Receivable, Recorded Investment [Line Items]
Total Loans	307,814	572,997
7 | 1-4 Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 307,814	477,783
7 | 1-4 Family Non-Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Total Loans		$ 95,214