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Note 9 - Equity - Various Stock Award Activities (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Weighted Average Grant Date Fair Value        
Fair value of awards   $ 28.9 $ 19.7 $ 11.0
Restricted Stock | Class A Common Stock        
Shares        
Outstanding, shares (in shares) 308,005 1,708,354 3,145,957  
Granted (in shares)   179,028 296,115  
Vested, shares (in shares)   (1,554,863) (1,695,234)  
Forfeited, shares (in shares)   (24,514) (38,484)  
Outstanding, shares (in shares)   308,005 1,708,354 3,145,957
Weighted Average Grant Date Fair Value        
Outstanding, Weighted average grant date fair value (in dollars per share) $ 14.42 $ 5.66 $ 4.04  
Granted, Weighted average grant date fair value (in dollars per share)   17.59 10.61  
Vested, Weighted average grant date fair value (in dollars per share)   5.17 3.37  
Forfeited, Weighted average grant date fair value (in dollars per share)   13.41 11.9  
Outstanding, Weighted average grant date fair value (in dollars per share)   $ 14.42 $ 5.66 $ 4.04
Fair value of awards   $ 20.7    
Restricted Stock | Class B Common Stock        
Shares        
Outstanding, shares (in shares) 33,296 341,683 680,718  
Vested, shares (in shares)   (310,956) (339,035)  
Forfeited, shares (in shares)   (3,210)    
Outstanding, shares (in shares)   33,296 341,683 680,718
Weighted Average Grant Date Fair Value        
Fair value of awards   $ 3.4    
Restricted Stock | Class B Common Stock | Class A shareholders        
Shares        
Share options distributed as non-cash and stock dividend (in shares)   4,902    
Restricted Stock | Class B Common Stock | Class B shareholders        
Shares        
Share options distributed as non-cash and stock dividend (in shares)   877    
Restricted Stock Units | Class A Common Stock        
Shares        
Outstanding, shares (in shares) 649,336 601,248 165,803  
Granted (in shares)   313,382 518,348  
Vested, shares (in shares)   (251,980) (82,903)  
Forfeited, shares (in shares)   (13,314)    
Outstanding, shares (in shares)   649,336 601,248 165,803
Weighted Average Grant Date Fair Value        
Outstanding, Weighted average grant date fair value (in dollars per share) $ 13.88 $ 11.3 $ 15.65  
Granted, Weighted average grant date fair value (in dollars per share)   17.39 10.61  
Vested, Weighted average grant date fair value (in dollars per share)   12.19 15.65  
Forfeited, Weighted average grant date fair value (in dollars per share)   12.01    
Outstanding, Weighted average grant date fair value (in dollars per share)   $ 13.88 $ 11.3 $ 15.65
Fair value of awards   $ 4.2    
Restricted Stock Units | Class B Common Stock        
Shares        
Outstanding, shares (in shares) 77,743 120,241 136,819  
Vested, shares (in shares)   (51,861) (16,578)  
Forfeited, shares (in shares)   (2,662)    
Outstanding, shares (in shares)   77,743 120,241 136,819
Weighted Average Grant Date Fair Value        
Fair value of awards   $ 0.6    
Restricted Stock Units | Class B Common Stock | Class A shareholders        
Shares        
Share options distributed as non-cash and stock dividend (in shares)   10,056    
Restricted Stock Units | Class B Common Stock | Class B shareholders        
Shares        
Share options distributed as non-cash and stock dividend (in shares)   1,969    
Performance Stock Units | Subsequent Events        
Weighted Average Grant Date Fair Value        
Fair value of awards $ 2.8      
Performance Stock Units | Class A Common Stock        
Shares        
Outstanding, shares (in shares) 1,057,468 767,054 248,706  
Granted (in shares)   315,941 518,348  
Forfeited, shares (in shares)   (25,527)    
Outstanding, shares (in shares)   1,057,468 767,054 248,706
Weighted Average Grant Date Fair Value        
Outstanding, Weighted average grant date fair value (in dollars per share) $ 22.19 $ 19.43 $ 22.21  
Granted, Weighted average grant date fair value (in dollars per share)   28.72 18.09  
Forfeited, Weighted average grant date fair value (in dollars per share)   19.88    
Outstanding, Weighted average grant date fair value (in dollars per share)   $ 22.19 $ 19.43 $ 22.21
Number of fully expected to vest equity instruments other than options outstanding (in shares)   222,000    
Performance Stock Units | Class B Common Stock        
Shares        
Outstanding, shares (in shares) 166,415 153,404 153,404  
Forfeited, shares (in shares)   (5,105)    
Outstanding, shares (in shares)   166,415 153,404 153,404
Weighted Average Grant Date Fair Value        
Number of fully expected to vest equity instruments other than options outstanding (in shares)   48,000    
Performance Stock Units | Class B Common Stock | Class A shareholders        
Shares        
Share options distributed as non-cash and stock dividend (in shares)   14,597    
Performance Stock Units | Class B Common Stock | Class B shareholders        
Shares        
Share options distributed as non-cash and stock dividend (in shares)   3,519