NET LOANS RECEIVABLE - Aging of Recorded Investment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
NET LOANS RECEIVABLE
Total Past Due	$ 16,757	$ 11,790
Loans Not Past Due	1,153,888	1,054,249
Total	1,170,645	1,066,039
30 to 59 Days Past Due
NET LOANS RECEIVABLE
Total Past Due	3,945	640
60 to 89 Days Past Due
NET LOANS RECEIVABLE
Total Past Due	2,772	535
90 or more Days Past Due
NET LOANS RECEIVABLE
Total Past Due	10,040	10,615
Commercial
NET LOANS RECEIVABLE
Total	779,480	682,911
Commercial | Real estate
NET LOANS RECEIVABLE
Total Past Due	2,504	5,493
Loans Not Past Due	447,948	408,882
Total	450,452	414,375
Commercial | Real estate | 30 to 59 Days Past Due
NET LOANS RECEIVABLE
Total Past Due	23	3
Commercial | Real estate | 60 to 89 Days Past Due
NET LOANS RECEIVABLE
Total Past Due	211
Commercial | Real estate | 90 or more Days Past Due
NET LOANS RECEIVABLE
Total Past Due	2,270	5,490
Commercial | Commercial and industrial
NET LOANS RECEIVABLE
Total Past Due	1,577	42
Loans Not Past Due	235,646	183,220
Total	237,223	183,262
Commercial | Commercial and industrial | 60 to 89 Days Past Due
NET LOANS RECEIVABLE
Total Past Due	26
Commercial | Commercial and industrial | 90 or more Days Past Due
NET LOANS RECEIVABLE
Total Past Due	1,551	42
Commercial | Construction
NET LOANS RECEIVABLE
Total Past Due	1,319	1,377
Loans Not Past Due	90,486	83,897
Total	91,805	85,274
Commercial | Construction | 90 or more Days Past Due
NET LOANS RECEIVABLE
Total Past Due	1,319	1,377
Residential mortgages
NET LOANS RECEIVABLE
Total Past Due	7,443	3,072
Loans Not Past Due	272,517	278,316
Total	279,960	281,388
Residential mortgages | 30 to 59 Days Past Due
NET LOANS RECEIVABLE
Total Past Due	2,666	156
Residential mortgages | 60 to 89 Days Past Due
NET LOANS RECEIVABLE
Total Past Due	1,272	217
Residential mortgages | 90 or more Days Past Due
NET LOANS RECEIVABLE
Total Past Due	3,505	2,699
Home equity loans and lines
NET LOANS RECEIVABLE
Total Past Due	3,859	1,782
Loans Not Past Due	76,486	78,476
Total	80,345	80,258
Home equity loans and lines | 30 to 59 Days Past Due
NET LOANS RECEIVABLE
Total Past Due	1,217	476
Home equity loans and lines | 60 to 89 Days Past Due
NET LOANS RECEIVABLE
Total Past Due	1,259	318
Home equity loans and lines | 90 or more Days Past Due
NET LOANS RECEIVABLE
Total Past Due	1,383	988
Consumer
NET LOANS RECEIVABLE
Total Past Due	55	24
Loans Not Past Due	30,805	21,458
Total	30,860	21,482
Consumer | 30 to 59 Days Past Due
NET LOANS RECEIVABLE
Total Past Due	39	5
Consumer | 60 to 89 Days Past Due
NET LOANS RECEIVABLE
Total Past Due	4
Consumer | 90 or more Days Past Due
NET LOANS RECEIVABLE
Total Past Due	$ 12	$ 19