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Note 4 - Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

						March 31, 2023
						Fair Value
		Carrying Value at March 31, 2023					Total				Level 1				Level 2				Level 3
		(Dollars in thousands)
Assets:
Current assets:
Cash equivalents (including restricted cash accounts)		$	40,401			$	40,401			$	40,401			$	—			$	—
Marketable securities ⁽³⁾			138				138				138				—				—
Long-term Assets:
Cross currency swap ⁽²⁾			9				9				—				9				—
Liabilities:
Current liabilities:
Derivatives:
Cross currency swap ⁽²⁾			(4,043	)			(4,043	)			—				(4,043	)			—
Currency forward contracts ⁽¹⁾			(1,793	)			(1,793	)			—				(1,793	)			—
Long term liabilities:
Cross currency swap ⁽²⁾			(8,067	)			(8,067	)			—				(8,067	)			—
		$	26,644			$	26,644			$	40,539			$	(13,894	)		$	—

						December 31, 2022
						Fair Value
		Carrying Value at December 31, 2022				Total				Level 1				Level 2				Level 3
		(Dollars in thousands)
Assets
Current assets:
Cash equivalents (including restricted cash accounts)		$	34,832			$	34,832			$	34,832			$	—			$	—
Marketable securities ⁽³⁾			136				136				136				—				—
Derivatives:
Long-term assets:
Cross currency swap ⁽²⁾			3,029				3,029				—				3,029				—
Liabilities:
Current liabilities:
Derivatives:
Currency forward contracts (1)			(800	)			(800	)			—				(800	)			—
Cross currency swap ⁽²⁾			(2,777	)			(2,777	)			—				(2,777	)			—

		$	34,420			$	34,420			$	34,968			$	(548	)		$	—

Derivative Instruments, Gain (Loss) [Table Text Block]

				Amount of recognized
				gain (loss)
Derivatives not designated as		*Location of recognized gain*		*Three Months Ended*
hedging instruments		*(loss)*		*March 31,*
				2023				2022
				(Dollars in thousands)
Currency forward contracts ⁽¹⁾		Derivative and foreign currency transaction gains (losses)		$	(1,656	)		$	(208	)

Derivatives designated as cash flow hedging instruments

Cross currency swap ⁽²⁾		Derivative and foreign currency transaction gains (losses)		$	(6,792	)		$	(6,682	)

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

		Three Months Ended March 31,
		2023				2022
		(Dollars in thousands)
Cross currency swap cash flow hedge:
Balance in Accumulated other comprehensive income (loss) beginning of period		$	3,920			$	5,745
Gain or (loss) recognized in Other comprehensive income (loss)			1,389				(8,587	)
Amount reclassified from Other comprehensive income (loss) into earnings			(6,792	)			6,682
Balance in Accumulated other comprehensive income (loss) end of period		$	(1,483	)		$	3,840

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]

		Fair Value								Carrying Amount *^()**
		March 31,				December 31,				March 31,				December 31,
		2023				2022				2023				2022
		(Dollars in millions)								(Dollars in millions)
Mizrahi Loan		$	71.4			$	71.4			$	70.3			$	70.3
Convertible Senior Notes			485.4				505.3				431.3				431.3
HSBC Loan			36.6				40.3				39.3				42.9
Hapoalim Loan			92.4				91.1				98.2				98.2
Hapoalim Loan 2023			100.0				—				100.0				—
Discount Loan			74.5				81.1				81.3				87.5
Finance liability - Dixie Valley			213.3				219.8				236.1				242.0
Olkaria III Loan - DFC			129.7				134.2				134.2				138.7
Olkaria III plant 4 Loan - DEG 2			26.9				26.5				27.5				27.5
Olkaria III plant 1 Loan - DEG 3			23.7				23.3				24.0				24.0
Platanares Loan - DFC			78.0				80.2				77.8				79.9
Amatitlan Loan			13.8				14.7				14.9				15.8
OFC 2 LLC ("OFC 2")			145.0				149.8				153.3				158.0
Don A. Campbell 1 ("DAC 1")			55.8				57.4				61.1				62.7
USG Prudential - NV			23.5				23.7				24.8				25.0
USG Prudential - ID			54.6				56.8				59.8				61.6
USG DOE			31.1				32.8				31.4				32.8
Senior Unsecured Bonds			232.1				235.1				249.0				255.8
Senior Unsecured Loan			156.1				166.4				166.4				174.8
Plumstriker			10.9				11.2				11.1				11.4
Other long-term debt			8.8				9.2				9.4				10.4

Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]

		Level 1				Level 2				Level 3				Total
		(Dollars in millions)
Mizrahi Loan		$	—			$	—			$	71.4			$	71.4
Convertible Senior Notes			—				485.4				—				485.4
HSBC Loan			—				—				36.6				36.6
Hapoalim Loan			—				—				92.4				92.4
Hapoalim Loan 2023			—				—				100.0				100.0
Discount Loan			—				—				74.5				74.5
Finance liability - Dixie Valley			—				—				213.3				213.3
Olkaria III Loan - DFC			—				—				129.7				129.7
Olkaria III plant 4 Loan - DEG 2			—				—				26.9				26.9
Olkaria III plant 1 Loan - DEG 3			—				—				23.7				23.7
Platanares Loan - DFC			—				—				78.0				78.0
Amatitlan Loan			—				13.8				—				13.8
OFC 2 Senior Secured Notes			—				—				145.0				145.0
DAC 1 Senior Secured Notes			—				—				55.8				55.8
USG Prudential - NV			—				—				23.5				23.5
USG Prudential - ID			—				—				54.6				54.6
USG DOE			—				—				31.1				31.1
Senior Unsecured Bonds			—				—				232.1				232.1
Senior Unsecured Loan			—				—				156.1				156.1
Plumstriker			—				10.9				—				10.9
Other long-term debt			—				—				8.8				8.8
Deposits			13.9				—				—				13.9

		Level 1				Level 2				Level 3				Total
		(Dollars in millions)
Mizrahi Loan		$	—			$	—			$	71.4			$	71.4
Convertible Senior Notes			—				505.3				—				505.3
HSBC Loan			—				—				40.3				40.3
Hapoalim Loan			—				—				91.1				91.1
Discount Loan			—				—				81.1				81.1
Financing Liability - Dixie Valley			—				—				219.8				219.8
Olkaria III Loan - DFC			—				—				134.2				134.2
Olkaria IV - DEG 2			—				—				26.5				26.5
Olkaria IV - DEG 3			—				—				23.3				23.3
Platanares Loan - DFC			—				—				80.2				80.2
Amatitlan Loan			—				14.7				—				14.7
OFC 2 Senior Secured Notes			—				—				149.8				149.8
DAC 1 Senior Secured Notes			—				—				57.4				57.4
USG Prudential - NV			—				—				23.7				23.7
USG Prudential - ID			—				—				56.8				56.8
USG DOE			—				—				32.8				32.8
Senior Unsecured Bonds			—				—				235.1				235.1
Senior Unsecured Loan			—				—				166.4				166.4
Plumstriker			—				11.2				—				11.2
Other long-term debt			—				—				9.2				9.2
Deposits			13.9				—				—				13.9