Impairment charges: Write down of assets related to restructuring and exit activity

No definition available.

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- Definition

Receivable from sale of business: Receivable from St. Louis contract manufacturing business sold by Applied Technology Division

+ References

No definition available.

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- Definition

The quantified amount of the future effect on cash flows.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4)

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- Definition

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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- Definition

Date the restructuring activities were initiated or are expected to be initiated, in CCYY-MM-DD format.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 4

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- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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Restructuring Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Jan. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Activities, Initiation Date	Mar. 10, 2015
Restructuring costs unpaid	$ 55us-gaap_EffectOnFutureCashFlowsAmount
Severance Costs	477us-gaap_SeveranceCosts1	0us-gaap_SeveranceCosts1
Impairment charges related to exit activity	0ravn_Impairmentcharges
Gain (Loss) on Disposition of Assets	364us-gaap_GainLossOnDispositionOfAssets1
Receivable from sale of business	789ravn_Receivablefromsaleofbusiness	0ravn_Receivablefromsaleofbusiness	0ravn_Receivablefromsaleofbusiness
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	393
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 84