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Note 8 - Commitments and Contingencies (Details Textual) - USD ($)
Mar. 31, 2021
Mar. 30, 2021
Dec. 31, 2020
Jul. 28, 2020
DFC [Member]        
Commitments And Contingencies [Line Items]        
Line of credit facility, maximum borrowing capacity       $ 765,000,000
BRAZIL        
Commitments And Contingencies [Line Items]        
Restricted Cash $ 3,000,000   $ 4,000,000  
Federal and State Value added Taxes Litigations and Civil Litigation and Disputes with Former Employees [Member] | BRAZIL        
Commitments And Contingencies [Line Items]        
Loss Contingency, Estimate of Possible Loss   $ 4,000,000    
Threat of Expropriation of Assets [Member] | BRAZIL        
Commitments And Contingencies [Line Items]        
Restricted Cash 3,000,000      
Assets, Noncurrent 39,000,000      
Amended ABL Credit Agreement [Member]        
Commitments And Contingencies [Line Items]        
Long-term line of credit 42,000,000      
L/C Facility Agreement [Member]        
Commitments And Contingencies [Line Items]        
Long-term line of credit 48,000,000      
Restricted cash 76,000,000      
Bank Guarantees and Letters of Credit [Member]        
Commitments And Contingencies [Line Items]        
Guarantor Obligations, Maximum Exposure, Undiscounted 2,000,000      
Surety Bond [Member]        
Commitments And Contingencies [Line Items]        
Guarantor Obligations, Maximum Exposure, Undiscounted $ 29,000,000