Total Assets of Continuing Operations (Detail) - USD ($) $ in Thousands	Jan. 31, 2018	Jul. 31, 2017
Segment Reporting Information [Line Items]
Total assets	$ 870,110	$ 281,298
Operating Segments
Segment Reporting Information [Line Items]
Total assets	797,648	171,037
Operating Segments | Americas
Segment Reporting Information [Line Items]
Total assets	21,944	21,876
Operating Segments | Asia
Segment Reporting Information [Line Items]
Total assets	51,805	63,819
Operating Segments | Europe
Segment Reporting Information [Line Items]
Total assets	57,039	64,639
Operating Segments | Direct Marketing
Segment Reporting Information [Line Items]
Total assets	646,840
Operating Segments | All Other
Segment Reporting Information [Line Items]
Total assets	20,020	20,703
Corporate-level activity
Segment Reporting Information [Line Items]
Total assets	$ 72,462	$ 110,261