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Note 13 - Tax Monetization Transactions (Details Textual) - USD ($) $ in Thousands							1 Months Ended	3 Months Ended	12 Months Ended					54 Months Ended	72 Months Ended
	Dec. 31, 2022	Oct. 31, 2017	Jul. 10, 2017	Dec. 16, 2016	Feb. 03, 2011	Oct. 30, 2009	Jan. 31, 2013	Dec. 31, 2009	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2008	Dec. 31, 2007	Jul. 31, 2017	Dec. 31, 2022	Dec. 15, 2016	Dec. 31, 2010
Proceeds from Noncontrolling Interests									$ 2,017	$ 1,972	$ 1,654
Noncontrolling Interest, Increase from Subsidiary Equity Issuance										44,102	156,635
OPC LLC [Member]
Payments to Acquire Additional Interest in Subsidiaries									1,932
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests									(1,932)
Ormat Nevada ORTP LLC [Member]
Payments to Acquire Additional Interest in Subsidiaries									2,400
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests									(4,051)
Noncontrolling Interest [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance										36,268	85,470
Noncontrolling Interest [Member] \| OPC LLC [Member]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests									6,537
Noncontrolling Interest [Member] \| Ormat Nevada ORTP LLC [Member]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests									(6,964)
Additional Paid-in Capital [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance										$ 7,834	$ 71,165
Additional Paid-in Capital [Member] \| OPC LLC [Member]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests									(8,469)
Additional Paid-in Capital [Member] \| Ormat Nevada ORTP LLC [Member]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests									$ 2,913
Opal Geo LLC [Member]
Percentage Of Distributable Cash to Controlling Interest				97.50%
Percentage of Income (Loss), Gain, Deduction and Credit Allocated to Controlling Interests				1.00%
Percentage of Income (Loss), Gain, Deduction and Credit Allocated to Controlling Interests, PTCs Not Available				95.00%
Opal Geo LLC [Member] \| Scenario, Forecast [Member]
Percentage of Income (Loss), Gain, Deduction and Credit Allocated to Controlling Interests	95.00%
Opal Geo LLC [Member] \| JPM Capital Corporation [Member]
Proceeds from Noncontrolling Interests				$ 62,100
Percentage Of Distributable Cash to Nontrolling Interests				2.50%
Percentage of Income (Loss), Gain, Deduction and Credit Allocated to Noncontrolling Interests				99.00%
Percentage of Income (Loss), Gain, Deduction and Credit Allocated to Noncontrolling Interests, PTCs Not Available				5.00%
Opal Geo LLC [Member] \| JPM Capital Corporation [Member] \| Noncontrolling Interest [Member]
Proceeds from Noncontrolling Interests				$ 3,700
Opal Geo LLC [Member] \| JPM Capital Corporation [Member] \| Liability for Sale of Tax Benefit [Member]
Proceeds from Noncontrolling Interests				$ 58,500
Opal Geo LLC [Member] \| JPM Capital Corporation [Member] \| Scenario, Forecast [Member]
Proceeds from Noncontrolling Interests															$ 21,000
Percentage Of Distributable Cash to Nontrolling Interests	100.00%
Percentage of Income (Loss), Gain, Deduction and Credit Allocated to Noncontrolling Interests	5.00%
Opal Geo LLC [Member] \| JPM Capital Corporation [Member] \| Capital Unit, Class B [Member]
Percentage of Equity Interest Sold				100.00%
Ormat Nevada ORTP LLC [Member]
Proceeds From Sale Of Equity Units												$ 63,000	$ 71,800
Percentage Of Ownership Interests Flip Date																	95.00%
Payments for Repurchase of Redeemable Noncontrolling Interest						$ 18,500
Gain From Repurchase Of Interests At Discount								$ 13,300
Adjustments To Additional Paid In Capital Purchase Of Noncontrolling Interest								$ 1,100
Percentage Of Ownership Interests Purchased From Noncontrolling Owners					1.50%			1.50%
Proceeds Sale Minority Interest					$ 24,900
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					$ 2,300
Proceeds from Sales of Business, Affiliate and Productive Assets							$ 35,700							$ 7,900
Additional Proceeds As Percentage Of Production Tax Credit							25.00%
Ormat Nevada ORTP LLC [Member] \| ORTP Transaction [Member]
Payments to Acquire Interest in Joint Venture			$ 2,400
Ormat Nevada, OPC LLC [Member] \| OPC Transaction [Member]
Payments to Acquire Additional Interest in Subsidiaries		$ 1,900
DAC 2 [Member]
Percentage Of Ownership Interests																63.25%
Other Geothermal Power Plants [Member]
Percentage Of Ownership Interests																100.00%
Opal Geo LLC [Member] \| Capital Unit, Class A [Member]
Percentage Of Ownership Interests				100.00%
OPC LLC [Member] \| JPM Capital Corporation [Member] \| Capital Unit, Class B [Member]
Fair Value of Equity Interest Sold				$ 3,000