Accounts and Contracts Receivables - Accounts and Contracts Receivables (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Accounts Receivable, Net, Current [Abstract]
Accounts receivable	$ 27,691	$ 30,032
Contracts receivable	2,877	3,639
Accounts and contracts receivable	30,568	33,671
Less long-term portion	(4,972)
Current accounts and contracts receivable	25,596	33,671
Less allowance for doubtful accounts	(5,821)	(6,339)
Current portion of accounts and contracts receivable, net of allowance for doubtful accounts	$ 19,775	$ 27,332

The aggregate of amounts due from customers or clients more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money at a future date more than one year from the balance sheet date, reduced to their estimated net realizable fair value by an allowance established by the Company of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LongTermAccountsNotesAndLoansReceivableNetNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant