Note 5 - Investment in Unconsolidated Companies (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Equity Method Investments [Table Text Block]

	December 31,
	2023		2022
	(Dollars in thousands)
Investment in Sarulla	$	71,744	$	74,881
Investment in Ijen		51,695		40,812
Other investment, at cost		2,000		—
Total investment in unconsolidated companies	$	125,439	$	115,693

Other Comprehensive Income (Loss) from Equity Method Investments[Table Text Block]

	Year Ended December 31,
	2023			2022		2021
	(Dollars in thousands)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge	$	(470	)	$	8,370	$	3,892