CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Jul. 31, 2022		6,485,309
Beginning balance at Jul. 31, 2022	$ (9,206)	$ 65	$ 7,479,906	$ (7,493,317)	$ 4,140
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,957			4,957
Preferred dividends	(537)			(537)
Restricted stock forfeitures, net of issuance (in shares)		13,712
Share-based compensation	177		177
Other comprehensive items	(3,915)				(3,915)
Ending balance (in shares) at Oct. 31, 2022		6,499,021
Ending balance at Oct. 31, 2022	$ (8,524)	$ 65	7,480,083	(7,488,897)	225
Beginning balance (in shares) at Jul. 31, 2023	6,250,493	6,250,493
Beginning balance at Jul. 31, 2023	$ 68,624	$ 65	61,534	7,612	(587)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,436			4,436
Preferred dividends	(536)			(536)
Restricted stock grants (in shares)		16,737
Share-based compensation	137		137
Other comprehensive items	$ (996)				(996)
Ending balance (in shares) at Oct. 31, 2023	6,267,230	6,267,230
Ending balance at Oct. 31, 2023	$ 71,665	$ 65	$ 61,671	$ 11,512	$ (1,583)