Note 6 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Dec. 31, 2019
Common Stock, Shares Authorized (in shares)	450,000,000	450,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized (in shares)	50,000,000	50,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares, Outstanding (in shares)	41,449,136	41,127,930
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	0	0
Stock Repurchase Program, Authorized Amount	$ 50.0		$ 50.0
Share Repurchase Program, Remaining Authorized, Amount	$ 39.8