Note 14 - Variable Interest Entity - Schedule of Variable Interest Entity Amounts (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Cash, cash equivalents and restricted cash	$ 201,991	$ 201,958	$ 179,201	$ 165,479
Total other assets	25,847	22,365
Current liabilities	115,728	109,812
Noncontrolling interests	(9,873)	(10,957)
Variable Interest Entity, Primary Beneficiary [Member] | Genie Retail Energy (“GRE”) [Member]
Cash, cash equivalents and restricted cash	395	313
Due from IDT	190	250
Prepaid expenses and other current assets	4	318
Other assets	364	363
Total other assets	953	1,244
Current liabilities	479	645
Due to IDT Energy	4,489	4,622
Noncontrolling interests	(4,015)	(4,023)
Total liabilities and noncontrolling interests	$ 953	$ 1,244