Summarized Financial Information of Continuing Operations by Operating Segment and Corporate-Level Activity (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended
	Apr. 30, 2018	Jan. 31, 2018	Apr. 30, 2017	Jan. 31, 2018	Apr. 30, 2018	Apr. 30, 2017
Segment Reporting Information [Line Items]
Revenues	$ 188,922	$ 151,578	$ 97,948	$ 254,100	$ 443,022	$ 336,843
Operating income (loss)	1,380		(5,243)		(8,153)	(12,389)
Total other income (expense)	(11,198)		763		(19,919)	(2,664)
Loss before income taxes	(9,818)		(4,480)		(28,072)	(15,053)
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	6,372		(4,062)		8,716	(8,645)
Operating Segments | Americas
Segment Reporting Information [Line Items]
Revenues	13,061		20,179		41,664	73,240
Operating income (loss)	(2,032)		(2,363)		(6,518)	(7,939)
Operating Segments | Asia
Segment Reporting Information [Line Items]
Revenues	31,820		37,056		111,622	118,790
Operating income (loss)	1,903		832		21,795	4,921
Operating Segments | Europe
Segment Reporting Information [Line Items]
Revenues	22,942		34,272		99,225	124,363
Operating income (loss)	(1,770)		(2,334)		(8,089)	(4,885)
Operating Segments | Direct Marketing
Segment Reporting Information [Line Items]
Revenues	115,647				173,019
Operating income (loss)	9,917				5,965
Operating Segments | e-Business
Segment Reporting Information [Line Items]
Revenues	5,452		6,441		17,492	20,450
Operating income (loss)	(1,646)		(197)		(4,437)	(742)
Corporate-level activity
Segment Reporting Information [Line Items]
Operating income (loss)	$ (4,992)		$ (1,181)		$ (16,869)	$ (3,744)