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Condensed Consolidated Statements of Cash Flows - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2024
Jan. 31, 2023
Jan. 31, 2024
Jan. 31, 2023
Jul. 31, 2023
Jul. 31, 2022
Cash flows from operating activities:            
Net loss $ (10,558,000) $ (4,805,000) $ (11,995,000) $ (15,901,000)    
Adjustments to reconcile net loss to net cash used in operating activities:            
Depreciation and amortization of property, plant and equipment 2,930,000 2,967,000 5,952,000 5,765,000    
Amortization of intangible assets with finite lives 5,288,000 5,349,000 10,577,000 10,698,000    
Amortization of stock-based compensation 2,189,000 1,268,000 4,834,000 2,172,000    
Amortization of cost to fulfill assets 240,000 240,000 480,000 480,000    
CEO transition costs related to equity-classified stock-based awards 0 0 0 3,764,000    
Amortization of deferred financing costs     1,543,000 664,000    
Gain on business divestiture, net (2,213,000) 0 (2,213,000) 0    
Changes in other liabilities     (2,067,000) (2,067,000)    
Loss on disposal of property, plant and equipment     19,000 78,000    
Provision for allowance for doubtful accounts     620,000 553,000    
Provision for excess and obsolete inventory     1,473,000 1,276,000    
Deferred income tax expense (benefit)     1,135,000 (2,034,000)    
Changes in assets and liabilities, net of effects of divestiture:            
Accounts receivable     (40,456,000) (11,764,000)    
Inventories     913,000 (5,725,000)    
Prepaid expenses and other current assets     2,157,000 1,781,000    
Other assets     2,397,000 (3,319,000)    
Accounts payable     (19,345,000) (6,939,000)    
Accrued expenses and other current liabilities     (3,089,000) (693,000)    
Contract liabilities     2,807,000 2,541,000    
Other liabilities, non-current     172,000 465,000    
Interest payable     (51,000) 961,000    
Income taxes payable     2,932,000 458,000    
Net cash used in operating activities     (41,205,000) (16,786,000) $ (4,433,000) $ 1,997,000
Cash flows from investing activities:            
Proceeds from divestiture     32,425,000 0    
Purchases of property, plant and equipment (4,273,000) (2,697,000) (7,489,000) (9,918,000)    
Net cash provided by (used in) investing activities     24,936,000 (9,918,000)    
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     22,619,000 39,000,000    
Repayment of debt under Term Loan     (18,738,000) (625,000)    
Remittance of employees’ statutory tax withholding for stock awards     (3,798,000) (2,473,000)    
Payment of deferred financing costs     (2,097,000) (3,616,000)    
Cash dividends paid on common stock     (265,000) (5,870,000)    
Proceeds from issuance of employee stock purchase plan shares     176,000 243,000    
Repayment of principal amounts under finance lease liabilities     0 (4,000)    
Net cash provided by financing activities     37,264,000 26,554,000    
Net increase (decrease) in cash and cash equivalents     20,995,000 (150,000)    
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 $ 39,956,000 $ 21,504,000 39,956,000 21,504,000 $ 18,961,000 $ 21,654,000
Cash paid during the period for:            
Interest     8,693,000 4,352,000    
Income taxes, net     1,951,000 609,000    
Non-cash investing and financing activities:            
Accrued additions to property, plant and equipment     1,271,000 3,339,000    
Adjustment to reflect redemption value of convertible preferred stock     8,157,000 3,447,000    
Unpaid convertible preferred stock issuance costs     440,000 0    
Accrued deferred financing costs     821,000 173,000    
Cash dividends declared on common stock but unpaid, including (reversal) accrual of dividend equivalents     (36,000) 3,139,000    
Accrued shelf registration costs     20,000 0    
Convertible Preferred Stock            
Cash flows from financing activities:            
Payment of issuance costs     (3,833,000) 0    
Shelf Registration            
Cash flows from financing activities:            
Payment of issuance costs     $ 0 $ (101,000)