Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Oct. 31, 2024	Apr. 30, 2024
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized (in shares)	1,000,000	1,000,000
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Shares Outstanding (in shares)	0	0
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (in shares)	50,000,000	50,000,000
Common Stock, Shares, Issued (in shares)	15,595,273	13,727,013
Common Stock, Shares, Outstanding (in shares)	8,253,186	6,394,675
Treasury Stock, Common, Shares (in shares)	7,342,087	7,332,338