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Note 12 - Share-based Payments (Details Textual)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Statement Line Items [Line Items]      
Increase (decrease) through share-based payment transactions, equity $ 484   $ 216
Expense from equity-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets $ 484 $ (0) (0)
Restricted stock units (RSUs) [member]      
Statement Line Items [Line Items]      
Vesting period of other equity instruments 3    
Performance share units (PSUs) [member]      
Statement Line Items [Line Items]      
Liabilities from share-based payment transactions $ 2,217 3,027  
Total expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets 853 692 634
Value of other equity instruments exercised or vested in share-based payment arrangement 2,272    
Proceeds from issuing other equity instruments 1,028 $ 420  
Value of other equity instruments exercised or vested in share-based payment arrangement, share capital 1,244   216
Increase (decrease) through share-based payment transactions, equity $ 804    
Performance share units (PSUs) [member] | Bottom of range [member]      
Statement Line Items [Line Items]      
Vesting period of other equity instruments 1    
Performance probability 93.00% 93.00%  
Performance multiplier 93.00% 93.00%  
Performance share units (PSUs) [member] | Top of range [member]      
Statement Line Items [Line Items]      
Vesting period of other equity instruments 3    
Performance probability 100.00% 100.00%  
Performance multiplier 100.00% 100.00%  
Equity-settled performance units (EPUs) [member]      
Statement Line Items [Line Items]      
Vesting period of other equity instruments 3    
Performance probability 100.00%    
Minimum holding period of other equity instruments (Year) 1 year    
Performance multiplier 100.00%    
Expense from equity-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets $ 417 $ 0 0
Share option programs [member]      
Statement Line Items [Line Items]      
Expense from equity-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets $ 67 $ 0 $ 0
Option life, share options granted 10    
Share-based compensation arrangement, percentage of outstanding stock maximum 10.00%    
Number of share options outstanding in share-based payment arrangement at end of period 20,000