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Note 19 - Stock and Debt Repurchases (Details Textual) - USD ($)
shares in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Apr. 01, 2021
Dec. 31, 2020
Dec. 31, 2017
Nov. 30, 2017
Stock and Debt Repurchase Program, Authorized Amount     $ 320,000      
Stock Repurchased and Retired During Period, Shares (in shares) 0 0        
Senior Secured Second Lien Notes due 2025 [Member]            
Repayments of Debt $ 17,092,000 $ 26,365,000        
Senior Notes [Member] | Senior Secured Second Lien Notes due 2025 [Member]            
Debt Instrument, Interest Rate, Stated Percentage 11.00% 11.00%   11.00% 11.00% 11.00%
Repayments of Debt $ 17,092,000 $ 26,365,000        
Debt Instrument, Repurchased Face Amount $ 18,040,000 $ 45,176,000