Fair Value Measurements (Tables)

3 Months Ended

Oct. 31, 2018

Fair Value Measurements [Abstract]

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

	Level 1 (1)		Level 2 (2)		Level 3 (3)		Total
	(in thousands)
October 31, 2018
Debt securities	$	1,695	$	542	$	—	$	2,237
Equity securities included in other current assets		292		—		—		292
Equity securities included in equity investments		—		—		2,816		2,816
Total	$	1,987	$	542	$	2,816	$	5,345
July 31, 2018
Debt securities	$	1,692	$	3,920	$	—	$	5,612
Equity securities included in other current assets		360		—		—		360
Total	$	2,052	$	3,920	$	—	$	5,972

(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

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

	Three Months Ended October 31,
	2018		2017
	(in thousands)
Balance, beginning of period	$	—	$	6,300
Transfer into Level 3 from adoption of change in accounting for equity investments		2,794		—
Total gains recognized in “Other expense, net”		22		—
Balance, end of period	$	2,816	$	6,300
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the period	$	22	$	—