Note 5 - Investment in Unconsolidated Companies - Unrealized Gain (Loss) on Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest Rate Swap [Member] \| Sarulla [Member]
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

The entity's proportionate share for the period of the other comprehensive income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item represents after tax unrealized gains (loss) recognized during the period.

No definition available.

Name:	ora_OtherComprehensiveIncomeLossFromEquityMethodInvestmentsUnrealizedGainsLossesOnDerivativeInstrumentsNetOfTax
Namespace Prefix:	ora_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration