FAIR VALUE - Non-Recurring Basis (Details) - USD ($)	9 Months Ended	12 Months Ended
	Mar. 31, 2020	Jun. 30, 2019
FAIR VALUE
Valuation allowance of impaired loans	$ 533,000	$ 426,000
Write-downs	8,000	17,000
Non-recurring basis
FAIR VALUE
Impaired loans, Commercial	2,359,000	840,000
Other real estate owned	260,000	158,000
Non-recurring basis | Level 3
FAIR VALUE
Impaired loans, Commercial	2,359,000	840,000
Other real estate owned	260,000	158,000
Carrying amount of impaired loans	2,900,000	1,300,000
Valuation allowance of impaired loans	$ 533,000	$ 426,000