Parent Company Financial Information - Schedule of condensed statements of financial condition (Parenthetical) (Details) - $ / shares	Jun. 30, 2023	Jun. 30, 2022
Parent Company Financial Information
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, issued (in shares)	12,452,921	14,896,590
Common stock, outstanding (in shares)	12,452,921	14,896,590