Financing Arrangements	3 Months Ended
Financing Arrangements	Apr. 30, 2011
Financing Arrangements [Abstract]
Financing Arrangements [Text Block]	Financing Arrangements Raven has an uncollateralized credit agreement providing a line of credit of $8,000 with a maturity date of July 1, 2011, bearing interest at the prime rate with a minimum rate of 4.00%. Letters of credit totaling $1,342 have been issued under the line, primarily to support self-insured workers compensation bonding requirements. No borrowings were outstanding as of April 30, 2011, January 31, 2011 or April 30, 2010, and $6,658 was available at April 30, 2011.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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