Balance Sheet - Accounts Receivable (Detail) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Accounts receivable:
Accounts receivable	$ 25,940	$ 30,032
Allowance for doubtful accounts	(5,492)	(6,339)
Total accounts receivable, net	$ 20,448	$ 23,693