General (Details)			3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	Jan. 22, 2024 USD ($)	Aug. 09, 2022 USD ($)	Apr. 30, 2024 USD ($)	Apr. 30, 2023 USD ($)	Jan. 31, 2024 USD ($)	Apr. 30, 2024 USD ($) segment	Apr. 30, 2023 USD ($)	Jul. 31, 2023 USD ($) segment	Jul. 31, 2022 USD ($)	Jul. 31, 2021 USD ($)	Jun. 17, 2024 USD ($)	Nov. 07, 2023 USD ($)	Nov. 30, 2022 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Operating income (loss)			$ (3,470,000)	$ (5,276,000)		$ 1,589,000	$ (15,781,000)	$ (14,660,000)	$ (33,752,000)	$ (68,298,000)
Net cash used in operating activities						44,998,000	177,000	4,433,000	$ (1,997,000)	$ 40,638,000
Net loss			(2,795,000)	7,458,000		9,200,000	23,359,000
Cash and cash equivalents			27,192,000			$ 27,192,000		$ 18,961,000
Number of operating segments | segment						2		2
Transition costs			2,492,000	0		$ 2,492,000	9,090,000
CEO transition costs related to equity-classified stock-based awards			0	$ 0		0	$ 3,764,000
Severance costs						$ 1,488,000		$ 3,872,000
Series B Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Convertible preferred stock	$ 50,000,000
Former CEO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Transition costs		$ 7,424,000
CEO transition costs related to equity-classified stock-based awards		3,764,000
Severance costs		3,660,000
Cash portion of transition costs		3,660,000
President and CEO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash sign-on bonus		$ 1,000,000
Credit Facility
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Actual secured leverage ratio						2.89
Maximum secured leverage ratio						3.50
Actual interest expense coverage ratio						3.36
Minimum interest expense coverage ratio						3.25
Minimum liquidity			26,800,000			$ 26,800,000							$ 25,000,000
Credit Facility | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Borrowings under credit facility											$ 187,000,000
Credit Facility | Revolving Loan Facility
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Line of credit facility, maximum borrowing capacity			135,000,000		$ 140,000,000	$ 135,000,000						$ 150,000,000
Credit Facility | Revolving Loan Facility | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash and cash equivalents											28,000,000
Borrowings under credit facility											25,000,000
Line of credit facility, maximum borrowing capacity											222,000,000
Debt Instrument, Covenant, Current Liquidity											63,000,000
Remaining borrowing capacity											35,000,000
Credit Facility | Line of Credit | Revolving Loan Facility | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Borrowings under credit facility											60,000,000
Credit Facility | Line of Credit | Term Loan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Line of credit facility, maximum borrowing capacity												$ 200,000,000
Line of credit facility, quarterly amortization			$ 1,875,000		$ 1,250,000
Credit Facility | Line of Credit | Term Loan | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Borrowings under credit facility											$ 162,000,000