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Accumulated Other Comprehensive Loss - Changes in Balance of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	$ (975)
Net Other Comprehensive Loss	(81)	$ (276)	$ (875)
Ending Balance	(1,056)	(975)
Foreign Currency Translation Adjustments [Member]
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	(983)	(714)	152
Other Comprehensive Loss	(65)	(269)	(866)
Amounts Reclassified to Net Income	0	0	0
Net Other Comprehensive Loss	(65)	(269)	(866)
Ending Balance	(1,048)	(983)	(714)
Unrealized Holding Gain (Loss) on Available for Sale Securities [Member]
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	8	15	24
Other Comprehensive Loss	(16)	(7)	(9)
Amounts Reclassified to Net Income	0	0	0
Net Other Comprehensive Loss	(16)	(7)	(9)
Ending Balance	(8)	8	15
Accumulated Other Comprehensive Income (Loss) [Member]
Schedule of Capitalization, Equity [Line Items]
Beginning Balance	(975)	(699)	176
Other Comprehensive Loss	(81)	(276)	(875)
Amounts Reclassified to Net Income	0	0	0
Net Other Comprehensive Loss	(81)	(276)	(875)
Ending Balance	$ (1,056)	$ (975)	$ (699)

X

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580

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-Topic 220
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-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580

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- Definition

Amount after tax, before reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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