Note 10 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finance Lease, Right-of-Use Asset, before Accumulated Amortization	$ 80,232	$ 112,334
Finance Lease, Right-of-Use Asset, Accumulated Amortization	34,036	56,761
Finance Lease, Right-of-Use Asset, Amortization	$ 27,846	$ 24,066	$ 15,691