Note 8 - Commitments and Contingencies (Details Textual) - USD ($)	Sep. 30, 2021	Dec. 31, 2020	Jul. 28, 2020
Commitments And Contingencies [Line Items]
Total restricted cash	$ 71,000,000
DFC Loan [Member]
Commitments And Contingencies [Line Items]
Loan			$ 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	41,000,000
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	44,000,000
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