Derivative and Other Financial Instruments with Off-Balance Sheet Risks (Detail Textuals)	3 Months Ended		6 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) Loan	Dec. 31, 2017 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)
Derivative [Line Items]
Derivative assets net amount	$ 1,000		$ 1,000			$ 0
Derivative liabilities net amount	$ 690,000		$ 690,000			$ 440,000
Commitments estimated may not fund (percent)	26.30%		26.30%			24.70%
Number of loans repurchased \| Loan			3
Amount of loans repurchased	$ 253,000		$ 253,000
Number of fully charged off loans repurchased \| Loan			2
Amount of fully charged off loans repurchased			$ (25,000)
Recovery from recourse liability	0	$ 22,000	33,000	$ 22,000
Total recourse reserve for loans sold	250,000	$ 283,000	250,000	$ 283,000	$ 250,000	$ 283,000	$ 305,000	$ 305,000
Other Assets
Derivative [Line Items]
Derivative assets net amount	506,000		506,000			849,000
Other Liabilities
Derivative [Line Items]
Derivative liabilities net amount	691,000		691,000			464,000
Loans held for investment and loans held for sale
Derivative [Line Items]
Commitments to extend credit	$ 34,600,000		$ 34,600,000			$ 66,300,000