Note 5 - Investment in an Unconsolidated Company (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Equity Method Investments [Table Text Block]

	December 31,
	2019		2018
	(Dollars in thousands)
Sarulla	$	70,589	$	71,983
Ijen		10,551		—
Total investment in unconsolidated companies	$	81,140	$	71,983

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

	Year Ended December 31,
	2019			2018
	(Dollars in thousands)
Change, net of deferred tax, in unrealized gains (losses) in respect of the Company’s share in derivative instruments of unconsolidated investment	$	(3,417	)	$	2,235