CONSOLIDATED STATEMENTS OF CHANGES IN NET WORTH AND SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock Mutual Holding Company	Common Stock Initial Public Offering	Common Stock	Additional Paid-In Capital Initial Public Offering	Additional Paid-In Capital	Retained Earnings	Unallocated Common Stock of ESOP	Accumulated Other Comprehensive Loss	Mutual Holding Company	Initial Public Offering	Total
Balance at beginning of period at Jun. 30, 2018						$ 127,052		$ (8,989)			$ 118,063
Increase (Decrease) in Shareholder's Equity
Net (loss) income						19,016					19,016
Other comprehensive income (loss)								(2,114)			(2,114)
Balance at end of period at Jun. 30, 2019						146,068		(11,103)			$ 134,965
Balance at end of period (in shares) at Jun. 30, 2019											0
Increase (Decrease) in Shareholder's Equity
Cumulative effect of change in accounting principle | ASU 2014-09						291					$ 291
Cumulative effect of change in accounting principle | ASU 2016-01						(116)		116
Net (loss) income						(6,509)					(6,509)
Other comprehensive income (loss)								(6,383)			(6,383)
Issuance of common stock	$ 143	$ 112		$ 108,800					$ 143	$ 108,912
Issuance of common stock (in shares)	14,287,723	11,170,402
Issuance of common stock to the Pioneer Bank Charitable Foundation			$ 5		$ 5,191						5,196
Issuance of common stock to the Pioneer Bank Charitable Foundation (in shares)			519,554
Purchase of common stock by the ESOP (1,018,325 shares)							$ (13,644)				(13,644)
ESOP shares committed to be released (25,458 shares)					(28)		1,023				995
Balance at end of period at Jun. 30, 2020			$ 260		$ 113,963	$ 139,734	$ (12,621)	$ (17,370)			$ 223,966
Balance at end of period (in shares) at Jun. 30, 2020			25,977,679								25,977,679