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Condensed Consolidated Statements of Cash Flows - USD ($)
 3 Months Ended 12 Months Ended
Oct. 31, 2024
Oct. 31, 2023
Jul. 31, 2024
Jul. 31, 2023
Cash flows from operating activities:        
Net loss $ (148,407,000) $ (1,437,000)    
Adjustments to reconcile net loss to net cash used in operating activities:        
Depreciation and amortization of property, plant and equipment 2,895,000 3,022,000    
Amortization of intangible assets with finite lives 6,593,000 5,289,000    
Amortization of stock-based compensation 155,000 2,645,000    
Amortization of cost to fulfill assets 261,000 240,000    
Paid-in-kind interest under term loan 2,082,000 0    
Accretion of interest on subordinated credit facility 248,000 0    
Amortization of deferred financing costs 973,000 594,000    
Write-off of deferred financing costs 1,412,000 0    
Change in fair value of warrants and derivatives 5,524,000 0    
Changes in other liabilities 0 (1,033,000)    
Loss on disposal of property, plant and equipment 0 6,000    
Provision for allowance for doubtful accounts and contract assets 17,443,000 143,000    
Provision for excess and obsolete inventory 12,546,000 78,000    
Deferred income tax (benefit) expense (166,000) 1,114,000    
Impairment of long-lived assets, including goodwill 79,555,000 0    
Changes in assets and liabilities, net of effects of divestiture:        
Accounts receivable (2,712,000) (26,269,000)    
Inventories (1,214,000) 2,656,000    
Prepaid expenses and other current assets (995,000) 997,000    
Other assets (1,096,000) 2,802,000    
Accounts payable 1,710,000 5,100,000    
Accrued expenses and other current liabilities (4,887,000) (6,538,000)    
Contract liabilities 4,218,000 (685,000)    
Other liabilities, non-current 105,000 145,000    
Interest payable (521,000) 58,000    
Income taxes payable 2,472,000 (3,472,000)    
Net cash used in operating activities (21,806,000) (14,545,000) $ (54,495,000) $ (4,433,000)
Cash flows from investing activities:        
Purchases of property, plant and equipment (2,415,000) (3,216,000)    
Net cash used in investing activities (2,415,000) (3,216,000)    
Cash flows from financing activities:        
Proceeds from subordinated credit facility 25,000,000 0    
Net borrowings under revolving loan 0 19,600,000    
Repayment of term loan 0 (625,000)    
Proceeds from issuance of employee stock purchase plan shares 38,000 94,000    
Payment of deferred financing costs (2,757,000) (308,000)    
Remittance of employees’ statutory tax withholding for stock awards (666,000) (1,682,000)    
Payment of shelf registration costs 94,000 0    
Cash dividends paid on common stock (39,000) (111,000)    
Net cash provided by financing activities 21,432,000 16,968,000    
Net decrease in cash and cash equivalents, including cash classified within assets of disposal group held for sale (2,789,000) (793,000)    
Less: net increase in cash classified within assets of disposal group held for sale 0 (52,000)    
Net decrease in cash and cash equivalents (2,789,000) (845,000)    
Cash and cash equivalents at beginning of period 32,433,000 18,961,000 18,961,000  
Cash and cash equivalents at end of period 29,644,000 18,116,000 $ 32,433,000 $ 18,961,000
Cash paid during the period for:        
Interest 6,728,000 4,278,000    
Income taxes, net 37,000 1,019,000    
Non-cash investing and financing activities:        
Adjustment to reflect redemption value of convertible preferred stock 58,634,000 1,823,000    
Term loan amendment fee paid-in-kind 3,250,000 0    
Accrued additions to property, plant and equipment 530,000 1,154,000    
Accrued deferred financing costs 418,000 444,000    
Accrued shelf registration costs 76,000 0    
Unpaid convertible preferred stock issuance costs 26,000 0    
Issuance of restricted stock 3,000 0    
Accrued remittance of employees' statutory tax withholdings 0 526,000    
Cash dividends declared on common stock but unpaid, including (reversal) accrual of dividend equivalents (27,000) (23,000)    
Convertible Preferred Stock        
Cash flows from financing activities:        
Payment of issuance costs $ (50,000) $ 0