Quarterly results of operations (Tables)

12 Months Ended

Jul. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Summary of Unaudited Quarterly Results

The following is a summary of unaudited quarterly results of operations for fiscal years 2017 and 2016:

	Year 2017
(in millions, except per share data)	First Quarter		Second Quarter		Third Quarter			Fourth Quarter
Net revenue	$	121.1	$	131.5	$	122.2		$	111.6
Gross profit		51.6		57.7		52.2			37.8
Net income (loss)		2.5		7.5		(59.7	)	$	(24.6	)
Basic net income (loss) per share	$	0.20	$	0.60	$	(4.78	)	$	(1.98	)
Diluted net income (loss) per share	$	0.20	$	0.59	$	(4.78	)	$	(1.98	)

	Year 2016
(in millions, except per share data)	First Quarter		Second Quarter			Third Quarter		Fourth Quarter
Net revenue	$	114.9	$	127.9		$	128.0	$	138.1
Gross profit		50.9		58.8			54.9		63.4
Net income (loss)		1.4		(3.0	)		5.0		8.8
Basic net income (loss) per share	$	0.11	$	(0.24	)	$	0.40	$	0.71
Diluted net income (loss) per share	$	0.11	$	(0.24	)	$	0.40	$	0.70