Debt (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	19 Months Ended
	Oct. 31, 2012	Nov. 30, 2013
Line of Credit Facility [Line Items]
Maturity date		Nov. 30, 2013
Line of Credit Facility, Maximum Borrowing Capacity	$ 38
Line of Credit Facility, Dividend Restrictions	do not permit payment of dividends
Document Period End Date	Oct. 31, 2012
Line of Credit Facility, Covenant Compliance	in compliance with all covenants under the Loan Agreement
Line of Credit Facility, Interest Rate Description	(a) a margin in effect plus a prime rate; or (b) a margin in effect plus the LIBOR rate for the corresponding interest period.
Line of Credit Facility, Interest Rate at Period End	3.25%
Line of Credit Facility, Amount Outstanding	17.8
Line of Credit Facility, Remaining Borrowing Capacity	8.7
Letters of Credit Outstanding, Amount	0.3
Restricted Cash and Cash Equivalents, Current	$ 0.9
Line of Credit Prime Rate [Member]
Line of Credit Facility [Line Items]
Margin added to rate	0.50%
Line of Credit Libor Rate [Member]
Line of Credit Facility [Line Items]
Margin added to rate	2.75%