Note 6 - Credit Losses - Allowance for Credit Losses by Portfolio (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($)
Trade Accounts Receivable [Member]
Beginning Balance	$ 4,597
Provision for expected credit losses	(3,297)
Beginning Balance	1,300
Other Non-trade Contractual Arrangements [Member]
Beginning Balance	6,948
Provision for expected credit losses	729
Beginning Balance	$ 7,677