Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023	Jul. 31, 2023	Jul. 31, 2022
Cash flows from operating activities:
Net loss	$ 2,795,000	$ (7,458,000)	$ (9,200,000)	$ (23,359,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization of property, plant and equipment	3,121,000	2,981,000	9,073,000	8,746,000
Amortization of intangible assets with finite lives	5,289,000	5,349,000	15,866,000	16,047,000
Amortization of stock-based compensation	404,000	4,126,000	5,238,000	6,298,000
Amortization of cost to fulfill assets	240,000	240,000	720,000	720,000
CEO transition costs related to equity-classified stock-based awards	0	0	0	3,764,000
Amortization of deferred financing costs			2,694,000	1,257,000
Change in fair value of warrants	(6,439,000)	0	(6,439,000)	0
Loss (gain) on business divestiture, net	200,000	0	(2,013,000)	0
Changes in other liabilities			(3,100,000)	(3,100,000)
Loss on disposal of property, plant and equipment			17,000	48,000
Provision for allowance for doubtful accounts			1,134,000	586,000
Provision for excess and obsolete inventory			2,243,000	2,753,000
Deferred income tax benefit			(1,013,000)	(4,926,000)
Changes in assets and liabilities, net of effects of divestiture:
Accounts receivable			(42,068,000)	(21,070,000)
Inventories			(10,189,000)	(14,383,000)
Prepaid expenses and other current assets			1,596,000	1,826,000
Other assets			1,159,000	(3,547,000)
Accounts payable			(7,316,000)	18,199,000
Accrued expenses and other current liabilities			2,117,000	(797,000)
Contract liabilities			(3,305,000)	8,621,000
Other liabilities, non-current			41,000	142,000
Interest payable			(112,000)	1,037,000
Income taxes payable			(2,141,000)	961,000
Net cash used in operating activities			(44,998,000)	(177,000)	$ (4,433,000)	$ 1,997,000
Cash flows from investing activities:
Proceeds from divestiture			33,225,000	0
Purchases of property, plant and equipment	(2,667,000)	(4,955,000)	(8,904,000)	(14,873,000)
Net cash provided by (used in) investing activities			24,321,000	(14,873,000)
Cash flows from financing activities:
Proceeds from issuance of convertible preferred stock			43,200,000	0
Net borrowings of long-term debt under Revolving Loan Facility			17,554,000	31,000,000
Repayment of debt under Term Loan			(20,613,000)	(1,250,000)
Remittance of employees’ statutory tax withholding for stock awards			(3,810,000)	(2,766,000)
Payment of deferred financing costs			(3,180,000)	(3,791,000)
Cash dividends paid on common stock			(267,000)	(8,658,000)
Proceeds from issuance of employee stock purchase plan shares			219,000	370,000
Repayment of principal amounts under finance lease liabilities			0	(4,000)
Net cash provided by financing activities			28,908,000	14,800,000
Net increase (decrease) in cash and cash equivalents			8,231,000	(250,000)
Cash and cash equivalents at beginning of period			18,961,000	21,654,000	21,654,000
Cash and cash equivalents at end of period	$ 27,192,000	$ 21,404,000	27,192,000	21,404,000	$ 18,961,000	$ 21,654,000
Cash paid during the period for:
Interest			12,743,000	8,070,000
Income taxes, net			3,794,000	123,000
Non-cash investing and financing activities:
Accrued additions to property, plant and equipment			1,630,000	1,421,000
Adjustment to reflect redemption value of convertible preferred stock			11,992,000	5,213,000
Unpaid convertible preferred stock issuance costs			154,000	0
Accrued deferred financing costs			1,479,000	17,000
Accrued remittance of employees' statutory tax withholdings			4,000	0
Cash dividends declared on common stock but unpaid, including (reversal) accrual of dividend equivalents			(104,000)	342,000
Accrued shelf registration costs			20,000	0
Reclassification of finance lease right-of-use assets to property, plant and equipment			0	274,000
Issuance of restricted stock			0	9,000
Convertible Preferred Stock
Cash flows from financing activities:
Payment of issuance costs			(4,195,000)	0
Shelf Registration
Cash flows from financing activities:
Payment of issuance costs			$ 0	$ (101,000)