Debt Financing Facilities	6 Months Ended
Debt Financing Facilities	Jul. 31, 2013
Debt Disclosure [Abstract]
Debt Financing Facilities	Debt Financing Facilities In May 2009, we entered into a Loan and Security Agreement with Silicon Valley Bank, which expired on April 30, 2013. The agreement included a revolving line of credit facility. On May 9, 2013 we entered into a Loan Agreement with Silicon Valley Bank. The agreement provides for a revolving line of credit facility, which expires May 9, 2015. Under the agreement, we are able to borrow up to $25 million. Interest on any drawdown under the revolving line of credit accrues either at the prime rate (3.25% in July 2013) or the LIBOR rate plus 2.75%. As of July 31, 2013, we had no balance outstanding under this agreement. The agreement contains customary financial covenants and other affirmative and negative covenants. We were in compliance with all covenants as of July 31, 2013.

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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