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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
 3 Months Ended 9 Months Ended
May 03, 2025
Apr. 27, 2024
May 03, 2025
Apr. 27, 2024
Changes in Accumulated Other Comprehensive Income (Loss) By Component        
Stockholders' equity, beginning balance $ 197,757,000 $ 213,271,000 $ 187,022,000 $ 247,310,000
Release of cumulative foreign currency translation adjustments associated with discontinued operations 0 0 0 (1,129,000)
Total other comprehensive income (loss), net of tax (91,000) (66,000) (108,000) (1,025,000)
Stockholders' equity, ending balance 200,391,000 208,889,000 200,391,000 208,889,000
Losses on available-for-sale securities 0 0 0 0
Total        
Changes in Accumulated Other Comprehensive Income (Loss) By Component        
Stockholders' equity, beginning balance (352,000) (432,000) (335,000) 527,000
Other comprehensive income (loss) before reclassifications (91,000) (66,000) (108,000) (2,170,000)
Release of cumulative foreign currency translation adjustments associated with discontinued operations     0 1,145,000
Total other comprehensive income (loss), net of tax (91,000) (66,000) (108,000) (1,025,000)
Stockholders' equity, ending balance (443,000) (498,000) (443,000) (498,000)
Available-for-sale Securities        
Changes in Accumulated Other Comprehensive Income (Loss) By Component        
Stockholders' equity, beginning balance (352,000) (432,000) (335,000) (602,000)
Other comprehensive income (loss) before reclassifications (91,000) (66,000) (108,000) 104,000
Release of cumulative foreign currency translation adjustments associated with discontinued operations     0 0
Total other comprehensive income (loss), net of tax (91,000) (66,000) (108,000) 104,000
Stockholders' equity, ending balance (443,000) (498,000) (443,000) (498,000)
Foreign Currency Translation        
Changes in Accumulated Other Comprehensive Income (Loss) By Component        
Stockholders' equity, beginning balance 0 0 0 1,129,000
Other comprehensive income (loss) before reclassifications 0 0 0 (2,274,000)
Release of cumulative foreign currency translation adjustments associated with discontinued operations     0 1,145,000
Total other comprehensive income (loss), net of tax 0 0 0 (1,129,000)
Stockholders' equity, ending balance $ 0 $ 0 $ 0 $ 0