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Fair Value Measurements - (Details) - Recurring basis - USD ($)
$ in Thousands
Jan. 25, 2025
Apr. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities $ 1,820 $ 937
Warrants 394 90
Total 2,214 1,027
Financial liabilities measured at fair value 0 0
Quoted prices in active market for identical assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities 1,820 937
Total 1,820 937
Significant other observable inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Warrants 394 90
Total $ 394 $ 90