Fair Value Measurements - Schedule of financial instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Financial assets
Cash and cash equivalents	$ 53,979	$ 86,792
Interest-bearing time deposits	1,242	4,768
Stock in FHLB	11,540	5,893
Stock in Federal Reserve Bank of St. Louis	9,061	5,790
Loans receivable, net	3,571,078	2,686,198
Accrued interest receivable	18,871	11,052
Financial liabilities
Deposits	3,725,540	2,815,075
Advances from FHLB	133,514	37,957
Accrued interest payable	4,723	801
Subordinated debt	23,105	23,055
Fair Value, Inputs, Level 1
Financial assets
Cash and cash equivalents	53,979	86,792
Financial liabilities
Deposits	2,661,479	2,176,444
Fair Value, Inputs, Level 2
Financial assets
Interest-bearing time deposits	1,242	4,768
Stock in FHLB	11,540	5,893
Stock in Federal Reserve Bank of St. Louis	9,061	5,790
Accrued interest receivable	18,871	11,052
Financial liabilities
Advances from FHLB	131,821	35,916
Accrued interest payable	4,723	801
Fair Value, Inputs, Level 3
Financial assets
Loans receivable, net	3,393,791	2,655,882
Financial liabilities
Deposits	1,053,650	637,163
Subordinated debt	$ 20,318	$ 22,070