Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Operating activities
Net income (loss)	$ 21,620	$ (518)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	8,956	10,479
Deferred income taxes	5,881	1,587
Provision for doubtful accounts receivable	1,069	1,466
Stock-based compensation	940	2,531
Other	(17)	(412)
Change in assets and liabilities:
Trade accounts receivable	(7,330)	6,253
Prepaid expenses, other current assets and other assets	4,965	(9,315)
Trade accounts payable, accrued expenses, other current liabilities, and other liabilities	1,631	(11,488)
Customer deposits at IDT Financial Services Limited (Gibraltar-based bank)	(11,136)	(20,613)
Deferred revenue	(968)	(3,260)
Net cash provided by (used in) operating activities	25,611	(23,290)
Investing activities
Capital expenditures	(8,825)	(7,656)
Payments for acquisitions, net of cash acquired	(2,388)	(450)
Purchase of Rafael Holdings, Inc. Class B common stock and warrant	(5,000)
Purchases of debt securities and equity investments	(34,436)	(8,994)
Proceeds from maturities and sales of debt securities and redemptions of equity investments	11,575	2,672
Net cash used in investing activities	(39,074)	(14,428)
Financing activities
Distributions to noncontrolling interests	(418)	(470)
Repayment of other liabilities.	(56)	(79)
Repayments of borrowings under revolving credit facility		(273)
Proceeds from borrowings under revolving credit facility		273
Proceeds from exercise of stock options	686	276
Repurchases of Class B common stock	(4,192)	(266)
Net cash used in financing activities	(3,980)	(539)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash and cash equivalents	5,560	14,152
Net decrease in cash, cash equivalents, and restricted cash and cash equivalents	(11,883)	(24,105)
Cash, cash equivalents, and restricted cash and cash equivalents at beginning of period	201,222	257,199
Cash, cash equivalents, and restricted cash and cash equivalents at end of period	189,339	233,094
Supplemental schedule of non-cash investing and financing activities
Liabilities incurred for acquisition	$ 393	$ 375