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Note 13 - Acquisitions (Details Textual)
$ in Thousands
6 Months Ended
May 02, 2022
USD ($)
Dec. 13, 2021
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
May 01, 2022
Dec. 31, 2021
USD ($)
Goodwill, Ending Balance     $ 418,270     $ 370,331
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain     $ 6,958 $ (0)    
RTC Canada [Member]            
Equity Method Investment, Ownership Percentage 80.00%       50.00%  
Asset Purchase Agreement With Summit [Member]            
Business Combination, Consideration Transferred, Total   $ 205,300        
Business Combination, Consideration Transferred, Liabilities Incurred   102,000        
Payments to Acquire Real Estate, Total   57,000        
Goodwill, Ending Balance   $ 73,710        
RTC Canada [Member]            
Goodwill, Ending Balance $ 47,939          
Business Acquisition, Percentage of Voting Interests Acquired 30.00%          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage 80.00%          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage 50.00%          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value $ 44,700          
Deferred Tax Liabilities, Reclassification of Foreign Currency Translation Adjustment 2,200          
Deferred Tax Liabilities, Re-measurement of Equity Method Investment 600          
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value $ 17,828          
RTC Canada [Member] | Measurement Input, Discount Rate [Member]            
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Measurement Inputs 0.11          
RTC Canada [Member] | Measurement Input, Long-Term Revenue Growth Rate [Member]            
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Measurement Inputs 0.03          
RTC Canada [Member] | RTC Canada [Member]            
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 20.00%          
RTC Canada [Member] | Other Income (Expense) [Member]            
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain $ 7,000