Income Taxes - Net deferred tax asset (Details) - USD ($)	Jun. 30, 2019	Jun. 30, 2018
Deferred tax assets
Federal net operating loss	$ 6,858,921	$ 6,618,021
Other real estate owned	708,259	819,818
State loss and contribution	3,050,448	2,978,855
Unrealized loss on available for sale securities	0	118,031
Bad debt reserve	352,489	360,714
Pension	226,412	0
Other assets	74,554	111,107
Total deferred tax assets	11,271,083	11,006,546
Deferred tax liabilities
Pension	0	(64,891)
Deferred loan fees	(131,008)	(131,132)
Depreciation	(113,769)	(108,766)
FHLB dividends	0	(62,985)
Unrealized gain on available for sale securities	(55,112)	0
Other liabilities	(72,573)	(74,349)
Total deferred tax liabilities	(372,462)	(442,123)
Valuation allowance	(10,868,032)	(10,503,245)
Net deferred tax asset	$ 30,589	$ 61,178