Fair Value Measurements (Tables)

6 Months Ended

Jan. 31, 2020

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, 2020
Debt securities	$	—	$	8,750	$	—	$	8,750
Equity investments included in current assets		5,890		—		—		5,890
Equity investments included in noncurrent assets		—		—		4,045		4,045
Total	$	5,890	$	8,750	$	4,045	$	18,685
July 31, 2019
Debt securities	$	—	$	2,534	$	—	$	2,534
Equity investments included in current assets		5,688		—		—		5,688
Equity investments included in noncurrent assets		—		—		3,619		3,619
Total	$	5,688	$	2,534	$	3,619	$	11,841

(1) – quoted prices in active markets for identical assets or liabilities

(2) – observable inputs other than quoted prices in active markets for identical assets and liabilities

(3) – no observable pricing inputs in the market

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,
	2020		2019			2020		2019
	(in thousands)
Balance, beginning of period	$	3,637	$	2,816		$	3,619	$	—
Transfer into Level 3 from adoption of change in accounting for equity investments		—		—			—		2,794
Total gains (losses) recognized in "Other income (expense), net"		408		(71	)		426		(49	)
Balance, end of period	$	4,045	$	2,745		$	4,045	$	2,745
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the period	$	408	$	(71	)	$	426	$	(49	)