Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Operating activities
Net loss	$ (1,148)	$ (1,797)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	5,594	5,673
Deferred income taxes	1,117	1,317
Provision for doubtful accounts receivable	447	566
Recognized loss (gain) on securities	46	(7)
Interest in the equity of investments		104
Stock-based compensation	413	810
Change in assets and liabilities:
Trade accounts receivable	97	(13,952)
Prepaid expenses, other current assets and other assets	(8,766)	(12,832)
Trade accounts payable, accrued expenses, other current liabilities and other liabilities	6,069	(9,359)
Customer deposits	5,567	(14,226)
Deferred revenue	(1,206)	(1,556)
Net cash provided by (used in) operating activities	8,230	(45,259)
Investing activities
Capital expenditures	(4,463)	(5,324)
Payment for acquisition, net of cash acquired	(5,453)
Proceeds from sale of interest in Straight Path IP Group Holding, Inc.		6,000
Purchase of IP Interest from Straight Path Communications Inc.		(6,000)
Purchases of marketable securities		(15,671)
Proceeds from maturities and sales of marketable securities	3,372	19,560
Net cash used in investing activities	(6,544)	(1,435)
Financing activities
Dividends paid		(4,720)
Distributions to noncontrolling interests	(339)	(380)
Repayment of other liabilities acquired	(599)
Repurchases of Class B common stock	(3,854)	(23)
Net cash used in financing activities	(4,792)	(5,123)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash and cash equivalents	(4,590)	575
Net decrease in cash, cash equivalents, and restricted cash and cash equivalents	(7,696)	(51,242)
Cash, cash equivalents, and restricted cash and cash equivalents at beginning of period	203,197	211,963
Cash, cash equivalents, and restricted cash and cash equivalents at end of period	$ 195,501	$ 160,721