Note J - Common Stock (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			6 Months Ended
	Oct. 22, 2024	Sep. 20, 2024	Oct. 31, 2024	Oct. 31, 2023	Apr. 30, 2024
Common Stock, Par or Stated Value Per Share (in dollars per share)		$ 0.01	$ 0.01		$ 0.01
Issuance of common stock			$ 73,969	$ 143
Common Stock, Shares, Outstanding (in shares)			8,253,186		6,394,675
Over-Allotment Option [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		255,000
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture	138,272
Proceeds from Issuance or Sale of Equity	$ 5,600
Public Offering [Member]
Stock Issued During Period, Shares, New Issues		1,700,000
Shares Issued, Price Per Share	$ 43	$ 43
Issuance of common stock		$ 68,200