INCOME TAXES - Reconciliation (Details) - USD ($) $ in Thousands			12 Months Ended
	Jan. 01, 2018	Dec. 22, 2017	Jun. 30, 2020	Jun. 30, 2019
Income tax expense differs from the amount expected based on the federal income tax statutory rate due to the following:
(Loss) income before tax at the federal tax rate			$ (2,059)	$ 5,008
State expense, net of federal benefit			(1,002)	580
Federal tax rate change				(580)
Tax-exempt income			(141)	(164)
Bank-owned life insurance			(115)	(25)
Other, net			21	11
Total income tax (benefit) expense			$ (3,296)	$ 4,830
Income tax expense differs from the amount expected based on the federal income tax statutory rate due to the following (as a percent):
(Loss) income before tax at the federal tax rate (as a percent)	21.00%	35.00%	21.00%	21.00%
State expense, net of federal benefit (as a percent)			10.20%	2.40%
Federal tax rate change (as a percent)				(2.40%)
Tax-exempt income (as a percent)			1.40%	(0.70%)
Bank-owned life insurance (as a percent)			1.20%	(0.10%)
Other, net (as a percent)			(0.20%)
Total income tax expense (as a percent)			33.60%	20.20%