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Note 1 - Basis of Presentation (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jan. 17, 2017
Mar. 31, 2017
Dec. 31, 2019
Jan. 01, 2017
Dec. 31, 2016
Accrued Liabilities, Current   $ 8,393     $ 13,802
Property, Plant and Equipment, Additions   $ 23,100      
Period for Creating Allowance for Doubtful Accounts   120 days      
Cumulative Effect of New Accounting Principle in Period of Adoption         1,107
Retained Earnings [Member]          
Cumulative Effect of New Accounting Principle in Period of Adoption         $ 1,107
Accounting Standards Update 2016-09 [Member] | Retained Earnings [Member]          
Cumulative Effect of New Accounting Principle in Period of Adoption       $ 1,100  
Scenario, Forecast [Member] | Accounting Standards Update 2016-02 [Member]          
New Accounting Pronouncement Effect, Right of Use Assets     $ 13,200    
New Accounting Pronouncement Effect, Lease Obligation Liability     $ 13,200    
GME [Member]          
Variable Interest Entity, Financial or Other Support, Amount $ 106,000        
Notes Payable, Current 106,000 $ 106,000      
Accrued Liabilities, Current 43,900 $ 43,846      
Green Bay Acquisition and Davenport Acquisition [Member]          
Business Combination, Consideration Transferred $ 269,900