Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024
Income Statement [Abstract]
Net sales	$ 126,574,000	$ 134,225,000	$ 242,374,000	$ 286,136,000
Cost of sales	92,834,000	91,027,000	194,118,000	195,056,000
Gross profit	33,740,000	43,198,000	48,256,000	91,080,000
Expenses:
Selling, general and administrative	33,832,000	30,307,000	85,476,000	63,002,000
Research and development	4,354,000	6,843,000	8,067,000	14,655,000
Amortization of intangibles	5,043,000	5,288,000	11,636,000	10,577,000
Impairment of long-lived assets, including goodwill	0	0	79,555,000	0
Proxy solicitation costs	1,099,000	0	2,682,000	0
CEO transition costs	(331,000)	0	267,000	0
Gain on business divestiture, net	0	(2,213,000)	0	(2,213,000)
Total operating expenses	43,997,000	40,225,000	187,683,000	86,021,000
Operating (loss) income	(10,257,000)	2,973,000	(139,427,000)	5,059,000
Other expenses (income):
Interest expense	11,008,000	5,265,000	20,540,000	10,197,000
Interest (income) and other	(126,000)	902,000	509,000	837,000
Write-off of deferred financing costs	0	0	1,412,000	0
Change in fair value of warrants and derivatives	28,568,000	0	34,092,000	0
Loss before (benefit from) provision for income taxes	(49,707,000)	(3,194,000)	(195,980,000)	(5,975,000)
(Benefit from) provision for income taxes	(968,000)	7,364,000	1,166,000	6,020,000
Net loss	(48,739,000)	(10,558,000)	(197,146,000)	(11,995,000)
Establishment of initial convertible preferred stock purchase option liability	0	13,640,000	(51,179,000)	13,640,000
Convertible preferred stock issuance costs	0	(4,273,000)	0	(4,273,000)
Deemed contributions (dividends) on convertible preferred stock	26,383,000	(2,061,000)	(32,251,000)	(3,884,000)
Net loss attributable to common stockholders	$ (22,356,000)	$ (30,532,000)	$ (178,218,000)	$ (33,792,000)
Net loss per common share (See Note 6):
Basic (in dollars per share)	$ (0.76)	$ (1.07)	$ (6.06)	$ (1.18)
Diluted (in dollars per share)	$ (0.76)	$ (1.07)	$ (6.06)	$ (1.18)
Weighted average number of common shares outstanding - basic (in shares)	29,339,000	28,662,000	29,393,000	28,704,000
Weighted average number of common and common equivalent shares outstanding - diluted (in shares)	29,339,000	28,662,000	29,393,000	28,704,000