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Note 6 - Subsequent Event (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
Sep. 25, 2023
Sep. 23, 2023
Sep. 24, 2022
Mar. 25, 2023
Common Stock, Shares, Issued (in shares)   7,978,401   7,562,604
Proceeds from Issuance of Common Stock   $ 384 $ 364  
Subsequent Event [Member]        
Proceeds from Issuance of Common Stock $ 80,500      
Subsequent Event [Member] | The Offering [Member]        
Shares Issued, Price Per Share (in dollars per share) $ 95.00      
Common Stock, Shares, Issued (in shares) 847,371      
Shares, Issued (in shares) 110,526      
Proceeds from Issuance Initial Public Offering $ 75,500