Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
OPERATING ACTIVITIES
Net income	$ 29,005	$ 96,891	$ 21,418
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	18,115	17,764	20,406
Deferred income taxes	4,801	(32,793)	(3,805)
Provision for doubtful accounts receivable	2,330	1,782	3,109
Net unrealized loss (gain) from marketable securities	18,960	(3,262)	(140)
Stock-based compensation	1,930	1,490	3,856
Other	3,379	(4,096)	492
Changes in assets and liabilities:
Trade accounts receivable	(21,322)	(3,728)	11,702
Disbursement prefunding, prepaid expenses, other current assets, and other assets	(8,003)	(2,247)	(1,719)
Trade accounts payable, accrued expenses, other current liabilities, and other liabilities	(1,110)	(264)	(12,081)
Customer deposits at IDT Financial Services Limited (Gibraltar-based bank)	(15,966)	(6,906)	(70,401)
Deferred revenue	(2,712)	1,989	(2,428)
Net cash provided by (used in) operating activities	29,407	66,620	(29,591)
INVESTING ACTIVITIES
Capital expenditures	(21,879)	(16,765)	(16,041)
Payments for acquisitions, net of cash acquired	(7,552)	(3,673)	(450)
Cash acquired from acquisition of interest in variable interest entity		3,336
Purchase of Rafael Holdings, Inc. Class B common stock and warrant		(5,000)
Exercise of warrant to purchase shares of Rafael Holdings, Inc. Class B common stock		(1,000)
Purchase of convertible preferred stock in equity method investment	(1,051)	(4,000)
Purchases of debt securities and equity investments	(24,454)	(43,187)	(22,429)
Proceeds from maturities and sales of debt securities and redemption of equity investments	21,157	26,230	6,457
Net cash used in investing activities	(33,779)	(44,059)	(32,463)
FINANCING ACTIVITIES
Distributions to noncontrolling interests	(514)	(848)	(934)
Payment for acquisition of warrant in variable interest entity		(791)
Proceeds from other liabilities	2,301	729
Repayment of other liabilities	(1,319)	(108)	(510)
Proceeds from sale of redeemable equity in subsidiary	10,000
Proceeds from note payable			10,000
Repayment of note payable			(10,000)
Proceeds from borrowings under revolving credit facility	2,566		1,429
Repayments of borrowings under revolving credit facility	(2,566)		(1,429)
Proceeds from exercise of stock options	137	687	276
Repurchases of Class B common stock	(26,222)	(4,192)	(4,482)
Net cash used in financing activities	(15,617)	(4,523)	(5,650)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash and cash equivalents	(17,365)	7,656	11,727
Net (decrease) increase in cash, cash equivalents, and restricted cash and cash equivalents	(37,354)	25,694	(55,977)
Cash, cash equivalents, and restricted cash and cash equivalents at beginning of year	226,916	201,222	257,199
Cash, cash equivalents, and restricted cash and cash equivalents at end of year	189,562	226,916	201,222
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash payments made for interest	461	486	388
Cash payments made for income taxes	109	193	60
SUPPLEMENTAL SCHEDULE OF NON-CASH FINANCING AND INVESTING ACTIVITIES
Liabilities incurred for acquisitions	7,849	628	375
Shares of the Company’s Class B common stock issued for acquisition	1,000
Cashless exercise of stock options in exchange for shares of the Company’s Class B common stock	14,930
Stock issued for matching contributions to the 401(k) Plan		$ 1,042