Balance Sheet - Accounts and Contracts Receivables (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Accounts Receivable, Net, Current [Abstract]
Accounts receivable	$ 18,700	$ 27,691
Contracts receivable	2,752	2,877
Accounts and contracts receivable	21,452	30,568
Less long-term portion	(4,968)	(4,972)
Current accounts and contracts receivable	16,484	25,596
Less allowance for doubtful accounts	(5,192)	(5,821)
Current portion of accounts and contracts receivable, net of allowance for doubtful accounts	$ 11,292	$ 19,775

For unclassified balance sheet, amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(5))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(9))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: 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(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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