Derivative and Other Financial Instruments with Off-Balance Sheet Risks: Schedule of Undisbursed Funds Commitments (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Derivative [Line Items]
Undisbursed funds on existing lines of credit and commitments to originate loans	$ 12,328	$ 14,652
Undisbursed loan funds - Construction loans
Derivative [Line Items]
Undisbursed funds on existing lines of credit and commitments to originate loans	6,592	4,302
Undisbursed lines of credit - Commercial business loans
Derivative [Line Items]
Undisbursed funds on existing lines of credit and commitments to originate loans	1,003	495
Undisbursed lines of credit - Consumer loans
Derivative [Line Items]
Undisbursed funds on existing lines of credit and commitments to originate loans	479	503
Commitments to extend credit on loans to be held for investment
Derivative [Line Items]
Undisbursed funds on existing lines of credit and commitments to originate loans	$ 4,254	$ 9,352