Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Operating activities
Net income (loss)	$ 2,867	$ 9,356	$ 13,169	$ 17,525
Net loss from discontinued operations, net of tax	47	(145)	(57)	(410)
Net income from continuing operations	2,820	9,501	13,226	17,935
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation			1,345	1,207
Provision for captive insurance liability	265	640	910	1,676
Provision for credit losses	547	481	856	1,210
Depreciation and amortization			470	415
Impairment of assets	35	118	35	118
Unrealized gain on marketable equity securities and investments and others, net			(622)	(443)
Inventory valuation allowance			0	417
Changes in assets and liabilities:
Trade accounts receivable			320	(6,565)
Inventory			4,682	(6,616)
Prepaid expenses			142	(4,479)
Other current assets and other assets			882	(1,919)
Trade accounts payable, accrued expenses and other liabilities			5,382	(18,156)
Due to IDT Corporation, net			(8)	4
Income taxes payable			(1,377)	2,362
Net cash provided by operating activities of continuing operations			14,191	26,324
Net cash provided by operating activities of discontinued operations			2,274	7,011
Net cash provided by operating activities			16,465	33,335
Investing activities
Purchases of marketable equity securities and other investments			(3,667)	(3,042)
Improvements in investment property			(1,075)	0
Purchase of equity of subsidiary			0	(1,200)
Proceeds from return of investments			1,173	0
Net cash used in investing activities			(7,251)	(7,148)
Financing activities
Dividends paid			(4,036)	(4,152)
Net cash used in financing activities			(9,117)	(12,325)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash			(64)	(140)
Net increase in cash, cash equivalents, and restricted cash			33	13,722
Cash, cash equivalents, and restricted cash (including cash held at discontinued operations) at beginning of period			201,958	165,479
Cash, cash equivalents and restricted cash (including cash held at discontinued operations) at end of the period	201,991	179,201	201,991	179,201
Less: Cash of discontinued operations at end of period	1,000	1,281	1,000	1,281
Cash, cash equivalents, and restricted cash (excluding cash held at discontinued operations) at end of period	$ 200,991	$ 177,920	200,991	177,920
Stock Repurchase Program [Member]
Financing activities
Repurchases of Class B common stock			(4,619)	(5,897)
Employees [Member]
Financing activities
Repurchases of Class B common stock			(462)	(1,508)
Genie Foundation [Member]
Financing activities
Repurchases of Class B common stock			0	(768)
Other Capital Expenditures [Member]
Investing activities
Capital expenditures			(3,682)	(1,562)
Solar System Facilities [Member]
Investing activities
Capital expenditures			$ 0	$ (1,344)