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Valuation and Qualifying Accounts (Parenthetical) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Valuation And Qualifying Accounts [Abstract]
Prior year adjustments	$ 89	$ 177
Reversal due to legal entity elimination	(280)
Expired tax losses		(745)
Adjustments	$ (191)	$ (568)	$ 29

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- Definition

Valuation allowances and reserves adjustments expired tax losses.

+ References

No definition available.

+ Details

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- Definition

Valuation allowances and reserves adjustments prior year adjustments.

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- Definition

Valuation allowances and reserves adjustments reversal due to legal entity elimination.

+ References

No definition available.

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- Definition

Amount of increase (decrease) in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from adjustments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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