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Note 10 - Equity (Details Textual)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2023
USD ($)
shares
Sep. 30, 2023
USD ($)
shares
Jun. 30, 2023
USD ($)
shares
Mar. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Sep. 30, 2022
USD ($)
Jun. 30, 2022
USD ($)
$ / shares
Mar. 31, 2022
USD ($)
Dec. 31, 2023
USD ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Feb. 06, 2024
shares
Dec. 31, 2021
shares
May 08, 2018
shares
Aug. 03, 2017
shares
Feb. 07, 2017
shares
Dec. 31, 2015
shares
Number of Stock Award and Incentive Plans                 1              
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares) 0       0       0 0            
Employee-related Liabilities, Total | $ $ 15,169       $ 13,936       $ 15,169 $ 13,936            
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)                         500,000 1,000,000    
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares) 156,664       609,352       156,664 609,352   677,144     500,000  
Treasury Stock, Value, Acquired, Cost Method | $ $ 2,945 $ 3,815 $ 7,617 $ 1,949 $ 524 $ 441 $ 1,317 $ 293 $ 16,300 $ 2,600            
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares         $ 0.1   $ 0.1                  
Dividends, Total | $ $ 2,158   $ 2,188   $ 2,199   $ 2,203   $ 4,300 $ 4,400            
Subsequent Event [Member]                                
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)                     350,000          
Restricted Stock [Member]                                
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)                 900,000              
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 1,100,000               1,100,000              
Phantom Restricted Stock Award [Member]                                
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares) 233,695 251,350 307,910 210,910 210,910       233,695 210,910            
Employee-related Liabilities, Total | $ $ 3,500       $ 4,800       $ 3,500 $ 4,800            
Maximum [Member]                                
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)                 10 years              
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)                               500,000
Common Class A [Member]                                
Number of Votes Per Share                 1              
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares                 $ 0.2 $ 0.2            
Common Class A [Member] | Maximum [Member]                                
Common Stock, Capital Shares Reserved for Future Issuance (in shares) 2,000,000               2,000,000              
Common Class B [Member]                                
Number of Votes Per Share                 10