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 (loss)	4,431			4,431
Preferred dividends	(1,074)			(1,074)
Restricted stock grants (in shares)		27,324
Share-based compensation	355		355
Other comprehensive items	740				740
Ending balance (in shares) at Jan. 31, 2023		6,512,633
Ending balance at Jan. 31, 2023	(4,754)	$ 65	7,480,261	(7,489,960)	4,880
Beginning balance (in shares) at Oct. 31, 2022		6,499,021
Beginning balance at Oct. 31, 2022	(8,524)	$ 65	7,480,083	(7,488,897)	225
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(526)			(526)
Preferred dividends	(537)			(537)
Restricted stock grants (in shares)		13,612
Share-based compensation	178		178
Other comprehensive items	4,655				4,655
Ending balance (in shares) at Jan. 31, 2023		6,512,633
Ending balance at Jan. 31, 2023	$ (4,754)	$ 65	7,480,261	(7,489,960)	4,880
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 (loss)	9,782			9,782
Preferred dividends	(1,073)			(1,073)
Restricted stock grants (in shares)		35,098
Share-based compensation	297		297
Other comprehensive items	$ (273)				(273)
Ending balance (in shares) at Jan. 31, 2024	6,285,591	6,285,591
Ending balance at Jan. 31, 2024	$ 77,357	$ 65	61,831	16,321	(860)
Beginning balance (in shares) at Oct. 31, 2023		6,267,230
Beginning balance at Oct. 31, 2023	71,665	$ 65	61,671	11,512	(1,583)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	5,346			5,346
Preferred dividends	(537)			(537)
Restricted stock grants (in shares)		18,361
Share-based compensation	160		160
Other comprehensive items	$ 723				723
Ending balance (in shares) at Jan. 31, 2024	6,285,591	6,285,591
Ending balance at Jan. 31, 2024	$ 77,357	$ 65	$ 61,831	$ 16,321	$ (860)