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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Jul. 31, 2020
Jul. 31, 2019
OPERATING ACTIVITIES    
Net income $ 21,418 $ 330
Adjustments to reconcile net income to net cash (used in) provided by operating activities:    
Depreciation and amortization 20,406 22,632
Deferred income taxes (3,805) 285
Provision for doubtful accounts receivable 3,109 2,028
Stock-based compensation 3,856 2,236
Other 352 (1,765)
Changes in assets and liabilities:    
Trade accounts receivable 11,702 7,594
Prepaid expenses, other current assets, and other assets (1,719) 4,119
Trade accounts payable, accrued expenses, other current liabilities, and other liabilities (12,081) (7,546)
Customer deposits at IDT Financial Services Limited (Gibraltar-based bank) (70,401) 59,077
Deferred revenue (2,428) (3,853)
Net cash (used in) provided by operating activities (29,591) 85,137
INVESTING ACTIVITIES    
Capital expenditures (16,041) (18,681)
Payments for acquisitions, net of cash acquired (450) (5,526)
Purchases of debt securities and equity investments (22,429) (8,276)
Proceeds from maturities and sales of debt securities and redemption of equity investments 6,457 6,312
Net cash used in investing activities (32,463) (26,171)
FINANCING ACTIVITIES    
Distributions to noncontrolling interests (934) (1,520)
Repayment of other liabilities (510) (654)
Proceeds from sales of Class B common stock to Howard S. Jonas   13,272
Proceeds from note payable 10,000
Repayment of note payable (10,000)
Proceeds from exercise of stock options 276
Proceeds from borrowings under revolving credit facility 1,429 3,000
Repayments of borrowings under revolving credit facility (1,429) (3,000)
Repurchases of Class B common stock (4,482) (3,882)
Net cash (used in) provided by financing activities (5,650) 7,216
Effect of exchange rate changes on cash, cash equivalents, and restricted cash and cash equivalents 11,727 (12,180)
Net (decrease) increase in cash, cash equivalents, and restricted cash and cash equivalents (55,977) 54,002
Cash, cash equivalents, and restricted cash and cash equivalents at beginning of year 257,199 203,197
Cash, cash equivalents, and restricted cash and cash equivalents at end of year 201,222 257,199
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION    
Cash payments made for interest 388 186
Cash payments made for income taxes 60 46
SUPPLEMENTAL SCHEDULE OF NON-CASH FINANCING AND INVESTING ACTIVITIES    
Liabilities incurred for acquisition 375
Howard S. Jonas’s advance payment used for sale of Class B common stock $ 1,500