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Investment Securities (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2018
Jun. 30, 2018
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 6,344 $ 7,220
Gross Unrealized Gains 219 276
Gross Unrealized (Losses) 0 0
Estimated Fair Value 6,563 7,496
Carrying value 6,563 7,496
U.S. government agency MBS    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 3,824 4,234
Gross Unrealized Gains 118 150
Gross Unrealized (Losses) 0 0
Estimated Fair Value 3,942 4,384
Carrying value 3,942 4,384
U.S. government sponsored enterprise MBS    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 2,213 2,640
Gross Unrealized Gains 98 122
Gross Unrealized (Losses) 0 0
Estimated Fair Value 2,311 2,762
Carrying value 2,311 2,762
Private issue CMO    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 307 [1] 346
Gross Unrealized Gains 3 [1] 4
Gross Unrealized (Losses) 0 [1] 0
Estimated Fair Value 310 [1] 350
Carrying value $ 310 [1] $ 350
[1] Collateralized Mortgage Obligations ("CMO").