CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)
Balance (in shares) at Jul. 31, 2021		6,760,660
Beginning balance at Jul. 31, 2021	$ 6,212	$ 68	$ 7,479,202	$ (7,480,220)	$ 7,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(10,968)			(10,968)
Preferred dividends	(2,129)			(2,129)
Issuance of common stock pursuant to employee stock purchase plan (in shares)		53
Restricted stock grants (in shares)		51,382
Restricted stock forfeitures (in shares)		(326,786)
Restricted stock forfeitures	0	$ (3)	3
Share-based compensation	701		701
Other comprehensive items	$ (3,022)				(3,022)
Balance (in shares) at Jul. 31, 2022	6,485,309	6,485,309
Ending 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)	7,460			7,460
Preferred dividends	(1,593)			(1,593)
Restricted stock grants (in shares)		44,240
Share-based compensation	529		529
Other comprehensive items	(79)				(79)
Balance (in shares) at Apr. 30, 2023		6,529,549
Ending balance at Apr. 30, 2023	$ (2,889)	$ 65	7,480,435	(7,487,450)	4,061
Balance (in shares) at Jul. 31, 2022	6,485,309	6,485,309
Beginning balance at Jul. 31, 2022	$ (9,206)	$ 65	7,479,906	(7,493,317)	4,140
Balance (in shares) at Jul. 31, 2023	6,250,493	6,250,493
Ending balance at Jul. 31, 2023	$ 68,624	$ 65	61,534	7,612	(587)
Balance (in shares) at Apr. 30, 2023		6,529,549
Beginning balance at Apr. 30, 2023	(2,889)	$ 65	7,480,435	(7,487,450)	4,061
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of exchange transaction (in shares)		0
Effect of exchange transaction	66,540	$ 0	(7,416,849)	7,487,450	(4,061)
Balance (in shares) at May. 01, 2023		6,529,549
Ending balance at May. 01, 2023	63,651	$ 65	63,586	0	0
Balance (in shares) at Apr. 30, 2023		6,529,549
Beginning balance at Apr. 30, 2023	(2,889)	$ 65	7,480,435	(7,487,450)	4,061
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	8,149
Preferred dividends	(537)
Other comprehensive items	$ (587)
Balance (in shares) at Jul. 31, 2023	6,250,493	6,250,493
Ending balance at Jul. 31, 2023	$ 68,624	$ 65	61,534	7,612	(587)
Balance (in shares) at May. 01, 2023		6,529,549
Beginning balance at May. 01, 2023	63,651	$ 65	63,586	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	8,149			8,149
Preferred dividends	(537)			(537)
Reverse/forward stock split settlement (in shares)		(299,069)
Reverse/forward stock split settlement	(2,288)		(2,288)
Restricted stock grants (in shares)		20,013
Share-based compensation	236		236
Other comprehensive items	$ (587)				(587)
Balance (in shares) at Jul. 31, 2023	6,250,493	6,250,493
Ending balance at Jul. 31, 2023	$ 68,624	$ 65	$ 61,534	$ 7,612	$ (587)