Note 7 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
BRAZIL
Commitments And Contingencies Disclosure [LineItems]
Restricted Cash and Investments, Noncurrent	$ 6	$ 6
Federal And State Value Added Taxes Litigations And Civil Litigation And Disputes With Former Employees [Member] | BRAZIL
Commitments And Contingencies Disclosure [LineItems]
Restricted Cash	98
Loss Contingency Accrual	5
Aggregate Claims	90
Loss Contingency, Estimate of Possible Loss	5
Restricted Cash and Investments, Noncurrent	6
Assets, Noncurrent	39
Bank Guarantees And Letters Of Credit [Member]
Commitments And Contingencies Disclosure [LineItems]
Guarantor Obligations, Maximum Exposure, Undiscounted	2
Surety Bond [Member]
Commitments And Contingencies Disclosure [LineItems]
Guarantor Obligations, Maximum Exposure, Undiscounted	47
L C Facility Agreement [Member]
Commitments And Contingencies Disclosure [LineItems]
Restricted Cash and Investments, Noncurrent	$ 25	$ 29