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Condensed Consolidated Statements of Operations - USD ($)
3 Months Ended
Oct. 31, 2023
Oct. 31, 2022
Income Statement [Abstract]    
Net sales $ 151,911,000 $ 131,139,000
Cost of sales 104,029,000 84,336,000
Gross profit 47,882,000 46,803,000
Expenses:    
Selling, general and administrative 32,695,000 29,337,000
Research and development 7,812,000 12,751,000
Amortization of intangibles 5,289,000 5,349,000
CEO transition costs 0 9,090,000
Total operating expenses 45,796,000 56,527,000
Operating income (loss) 2,086,000 (9,724,000)
Other expenses (income):    
Interest expense 4,932,000 2,235,000
Interest (income) and other (65,000) (255,000)
Loss before benefit from income taxes (2,781,000) (11,704,000)
Benefit from income taxes (1,344,000) (608,000)
Net loss (1,437,000) (11,096,000)
Dividend on convertible preferred stock (1,823,000) (1,710,000)
Net loss attributable to common stockholders $ (3,260,000) $ (12,806,000)
Net loss per common share (See Note 6):    
Basic (in dollars per share) $ (0.11) $ (0.46)
Diluted (in dollars per share) $ (0.11) $ (0.46)
Weighted average number of common shares outstanding - basic (in shares) 28,745,000 27,830,000
Weighted average number of common and common equivalent shares outstanding - diluted (in shares) 28,745,000 27,830,000