CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Surplus	Retained Earnings	Accumulated Other Comprehensive (Loss) Income, Net	Total
Balance at Sep. 30, 2020	$ 42	$ 63,725	$ 14,120	$ 156	$ 78,043
Balance (in shares) at Sep. 30, 2020	4,175,144
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			10,851		10,851
Other comprehensive income (loss), net of tax				100	100
Stock-based compensation		901			901
Stock-based compensation (in shares)	25,588
Common stock issued in purchase of Savoy Bank	$ 14	31,238			31,252
Common stock issued in purchase of Savoy Bank (in shares)	1,357,567
Savoy Bank acquisition rollover options		1,269			1,269
Issuance of common stock		113			113
Issuance of common stock (in shares)	5,127
Balance at Sep. 30, 2021	$ 56	97,246	24,971	256	122,529
Balance (in shares) at Sep. 30, 2021	5,563,426
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			23,556		23,556
Other comprehensive income (loss), net of tax				(876)	(876)
Issuance of common stock in lieu of directors' fees		42			42
Issuance of common stock in lieu of directors' fees (in shares)	2,384
Cash dividends paid			(2,052)		(2,052)
Stock-based compensation		1,684			1,684
Stock awards granted, net of forfeitures	$ 2	(2)
Stock awards granted, net of forfeitures (in shares)	254,265
Shares received related to tax withholding		(28)			(28)
Shares received related to tax withholding (in shares)	(677)
Issuance of common stock	$ 15	27,714			27,729
Issuance of common stock (in shares)	1,466,250
Balance at Sep. 30, 2022	$ 73	$ 126,656	$ 46,475	$ (620)	$ 172,584
Balance (in shares) at Sep. 30, 2022	7,285,648