Balance Sheet - Accounts and Contracts Receivables (Detail) - USD ($) $ in Thousands	Oct. 31, 2017	Jan. 31, 2017
Accounts Receivable, Net, Current [Abstract]
Accounts receivable	$ 16,015	$ 21,762
Contracts receivable	5,374	2,752
Accounts and contracts receivable	21,389	24,514
Less long-term portion	(6,259)	(4,968)
Current accounts and contracts receivable	15,130	19,546
Less current portion of allowance for doubtful accounts	(2,965)	(3,716)
Current portion of accounts and contracts receivable, net of allowance for doubtful accounts	$ 12,165	$ 15,830

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