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Note 4 - Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

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

						September 30, 2023
						Fair Value
		Carrying Value at September 30, 2023				Total				Level 1				Level 2				Level 3
		(Dollars in thousands)
Assets:
Current assets:
Cash equivalents (including restricted cash accounts)		$	30,483			$	30,483			$	30,483			$	—			$	—
Marketable securities ⁽¹⁾			141				141				141				—				—
Liabilities:
Current liabilities:
Derivatives:
Cross currency swap ⁽²⁾			(5,463	)			(5,463	)			—				(5,463	)			—
Currency forward contracts ⁽³⁾			(1,084	)			(1,084	)			—				(1,084	)			—
Long term liabilities:
Cross currency swap ⁽²⁾			(19,628	)			(19,628	)			—				(19,628	)			—
		$	4,449			$	4,449			$	30,624			$	(26,175	)		$	—

						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 ⁽¹⁾			136				136				136				—				—
Derivatives:
Long-term assets:
Cross currency swap ⁽²⁾			3,029				3,029				—				3,029				—
Liabilities:
Current liabilities:
Derivatives:
Currency forward contracts ⁽³⁾			(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)								Amount of recognized gain (loss)
Derivatives not designated as hedging instruments		Location of recognized gain (loss)		Three Months Ended September 30,								Nine Months Ended September 30,
				2023				2022				2023				2022
				(Dollars in thousands)								(Dollars in thousands)
Currency forward contracts ⁽¹⁾		Derivative and foreign currency transaction gains (losses)		$	(1,090	)		$	(678	)		$	(3,817	)		$	(5,384	)

Derivatives designated as cash flow hedging instruments

Cross currency swap ⁽²⁾		Derivative and foreign currency transaction gains (losses)		$	(7,011	)		$	(3,121	)		$	(17,564	)		$	(38,536	)

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

		Three Months Ended September 30,								Nine Months Ended September 30,
		2023				2022				2023				2022
		(Dollars in thousands)								(Dollars in thousands)
Cross currency swap cash flow hedge:
Balance in Accumulated other comprehensive income (loss) beginning of period		$	993			$	1,745			$	3,920			$	5,745
Gain or (loss) recognized in Other comprehensive income (loss)			2,262				(3,338	)			9,888				(42,753	)
Amount reclassified from Other comprehensive income (loss) into earnings			(7,011	)			3,121				(17,564	)			38,536
Balance in Accumulated other comprehensive income (loss) end of period		$	(3,756	)		$	1,528			$	(3,756	)		$	1,528

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

		Fair Value								Carrying Amount *^()**
		September 30, 2023				December 31, 2022				September 30, 2023				December 31, 2022
		(Dollars in millions)								(Dollars in millions)
Mizrahi Loan		$	65.2			$	71.4			$	65.6			$	70.3
Convertible Senior Notes			419.8				505.3				431.3				431.3
HSBC Loan			35.9				40.3				35.7				42.9
Hapoalim Loan			83.2				91.1				89.3				98.2
Hapoalim Loan 2023			97.1				—				95.0				—
Discount Loan			67.9				81.1				75.0				87.5
Finance liability - Dixie Valley			201.4				219.8				225.8				242.0
Olkaria III Loan - DFC			118.9				134.2				125.2				138.7
Olkaria III plant 4 Loan - DEG 2			24.2				26.5				25.0				27.5
Olkaria III plant 1 Loan - DEG 3			21.3				23.3				21.8				24.0
Platanares Loan - DFC			72.1				80.2				73.7				79.9
Amatitlan Loan			—				14.7				—				15.8
OFC 2 LLC ("OFC 2")			135.6				149.8				146.7				158.0
Don A. Campbell 1 ("DAC 1")			52.5				57.4				58.8				62.7
USG Prudential - NV			22.2				23.7				24.3				25.0
USG Prudential - ID			52.0				56.8				58.9				61.6
USG DOE			29.0				32.8				30.1				32.8
Senior Unsecured Bonds			190.4				235.1				209.2				255.8
Senior Unsecured Loan			145.3				166.4				158.0				174.8
Plumstriker			—				11.2				—				11.4
Other long-term debt			7.5				9.2				8.1				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		$	—			$	—			$	65.2			$	65.2
Convertible Senior Notes			—				419.8				—				419.8
HSBC Loan			—				—				35.9				35.9
Hapoalim Loan			—				—				83.2				83.2
Hapoalim Loan 2023			—				—				97.1				97.1
Discount Loan			—				—				67.9				67.9
Finance liability - Dixie Valley			—				—				201.4				201.4
Olkaria III Loan - DFC			—				—				118.9				118.9
Olkaria III plant 4 Loan - DEG 2			—				—				24.2				24.2
Olkaria III plant 1 Loan - DEG 3			—				—				21.3				21.3
Platanares Loan - DFC			—				—				72.1				72.1
OFC 2 Senior Secured Notes			—				—				135.6				135.6
DAC 1 Senior Secured Notes			—				—				52.5				52.5
USG Prudential - NV			—				—				22.2				22.2
USG Prudential - ID			—				—				52.0				52.0
USG DOE			—				—				29.0				29.0
Senior Unsecured Bonds			—				—				190.4				190.4
Senior Unsecured Loan			—				—				145.3				145.3
Other long-term debt			—				—				7.5				7.5
Deposits		21.2					—				—				21.2

		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