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Note 1 - Principles of Consolidation and Basis of Presentation (Details Textual)
$ / shares in Units, $ in Millions
Aug. 28, 2023
$ / shares
shares
Jul. 25, 2020
Mar. 31, 2024
USD ($)
$ / shares
Dec. 31, 2023
$ / shares
Common Stock, Par or Stated Value Per Share     $ 0.01 $ 0.01
Common Class A [Member]        
Additional Share Issued for Every Two Shares of Common Stock | shares 1      
Common Stock, Par or Stated Value Per Share $ 0.01      
Common Class B [Member]        
Common Stock, Par or Stated Value Per Share $ 0.01      
Stock Split From [Member]        
Stockholders' Equity Note, Stock Split, Conversion Ratio   3    
Stock Split To [Member]        
Stockholders' Equity Note, Stock Split, Conversion Ratio   2    
Deposits for Restrictions Related to Captive Insurance Company [Member]        
Restricted Cash and Cash Equivalents, Current | $     $ 3.1