Fair Value Measurements (Tables)

6 Months Ended

Jan. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of balance of assets measured at fair value on a recurring basis

	Level 1 (1)		Level 2 (2)		Level 3 (3)			Total
	(in thousands)
January 31, 2021
Debt securities	$	3,667	$	17,834	$	—		$	21,501
Equity investments included in current assets		29,470		—		—			29,470
Equity investments included in noncurrent assets		—		2,416		2,319			4,735
Total	$	33,137	$	20,250	$	2,319		$	55,706
Contingent consideration included in other noncurrent liabilities	$	—	$	—	$	(799	)	$	(799	)
July 31, 2020
Debt securities	$	2,498	$	15,865	$	—		$	18,363
Equity investments included in current assets		5,964		—		—			5,964
Equity investments included in noncurrent assets		—		—		3,825			3,825
Total	$	8,462	$	15,865	$	3,825		$	28,152
Contingent consideration included in other noncurrent liabilities	$	—	$	—	$	(396	)	$	(396	)

Schedule of assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)

	Three Months Ended January 31,				Six Months Ended January 31,
	2021		2020		2021			2020
	(in thousands)
Balance, beginning of period	$	1,825	$	3,637	$	3,825		$	3,619
Purchase of Rafael Holdings, Inc. warrant		354		—		354			—
Redemption for Visa mandatory release assessment		—		—		(1,870	)		—
Total gains recognized in “Other income, net”		140		408		10			426
Balance, end of period	$	2,319	$	4,045	$	2,319		$	4,045
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the period	$	—	$	—	$	—		$	—

Schedule of liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)

	Three Months Ended January 31,					Six Months Ended January 31,
	2021		2020			2021		2020
	(in thousands)
Balance, beginning of period	$	391	$	—		$	396	$	—
Transfer into Level 3 from acquisitions (see Note 9)		393		375			393		375
Total loss (gain) included in “Foreign currency translation adjustment”		15		(5	)		10		(5	)
Balance, end of period	$	799	$	370		$	799	$	370
Change in unrealized gains or losses for the period included in earnings for liabilities held at the end of the period	$	—	$	—		$	—	$	—