Investment Securities: Schedule of Available-for-sale Securities Reconciliation (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended			12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2017		Dec. 31, 2016	Jun. 30, 2017		Jun. 30, 2016
Schedule of Available-for-sale Securities [Line Items]
Total Investment Securities, Amortized Cost Basis		$ 95,694			$ 95,694			$ 69,395		$ 69,395
Proceeds from Maturities, Prepayments and Calls of Mortgage Backed Securities (MBS)		5,800		$ 3,200	11,722		$ 7,296
Amortized Cost		8,068			8,068			8,954
Held-to-maturity Securities, Gross Gains, Derivatives					147			265
Held-to-maturity Securities, Gross Losses, Derivatives					437			77
Held-to-maturity Securities		87,626			87,626			60,441
Held-to-maturity Securities, Fair Value		87,336			87,336			60,629
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment		87,626			87,626			60,441
Gross Unrealized Gains					337			364
Gross Unrealized Losses					0			0
Investment securities – available for sale, at fair value		8,405			8,405			9,318
Carrying Value		8,405			8,405			9,318
Total Investment Securities, Gross Unrealized Gains					484			629
Total Investment Securities, Gross Unrealized Losses					437			77
Total Investment Securites		95,741			95,741			69,947		69,947
Total Investment Securities, Carrying Value		96,031			96,031			69,759
Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities, Gross Gains, Derivatives					0			0
Held-to-maturity Securities, Gross Losses, Derivatives					0			0
Held-to-maturity Securities		600			600			600
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment		600			600			600
Categories of Investments, Marketable Securities, Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities – available for sale, at fair value		8,405			8,405					9,318
Carrying Value		8,405			8,405					$ 9,318
U.S. government agency MBS
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		4,678			4,678			5,197	[1]
Gross Unrealized Gains					181			186	[1]
Gross Unrealized Losses					0			0	[1]
Investment securities – available for sale, at fair value		4,859			4,859			5,383
Carrying Value		4,859			4,859			5,383
U.S. government sponsored enterprise MBS
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		2,977			2,977			3,301
Held-to-maturity Securities, Gross Gains, Derivatives					147	[1]		265
Held-to-maturity Securities, Gross Losses, Derivatives					437	[1]		77
Held-to-maturity Securities		87,026			87,026			59,841
Held-to-maturity Securities, Fair Value		86,736			86,736			60,029
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment		87,026	[1]		87,026	[1]		59,841
Gross Unrealized Gains					150			173
Gross Unrealized Losses					0			0
Investment securities – available for sale, at fair value		3,127			3,127			3,474
Carrying Value		3,127			3,127			3,474
Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[2]	413			413			456
Gross Unrealized Gains	[2]				6			5
Gross Unrealized Losses	[2]				0			0
Investment securities – available for sale, at fair value		419			419			461
Carrying Value		$ 419			$ 419			$ 461

[1] Mortgage-Backed Securities (“MBS”).

[2] Collateralized Mortgage Obligations (“CMO”).