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Fair Value Measurements - Hierarchy and Transfers (Details) - USD ($)
$ in Thousands
Jul. 30, 2022
Apr. 30, 2022
Assets    
Total assets $ 48,965 $ 51,537
Recurring basis    
Assets    
Marketable securities 40,119 42,621
Held-to-maturity investments 1,267 1,337
Cost basis investments 7,579 7,579
Total assets 48,965 51,537
Liabilities    
Contingent consideration liability 800 800
Recurring basis | Level 1    
Assets    
Marketable securities 0 0
Held-to-maturity investments 1,267 1,337
Cost basis investments 0 0
Total assets 1,267 1,337
Liabilities    
Contingent consideration liability 0 0
Recurring basis | Level 2    
Assets    
Marketable securities 31,024 33,578
Held-to-maturity investments 0 0
Cost basis investments 0 0
Total assets 31,024 33,578
Liabilities    
Contingent consideration liability 0 0
Recurring basis | Level 3    
Assets    
Marketable securities 2,500 2,500
Held-to-maturity investments 0 0
Cost basis investments 7,579 7,579
Total assets 10,079 10,079
Liabilities    
Contingent consideration liability 800 800
Recurring basis | NAV    
Assets    
Marketable securities 6,595 6,543
Held-to-maturity investments 0 0
Cost basis investments 0 0
Total assets 6,595 6,543
Liabilities    
Contingent consideration liability $ 0 $ 0