Income taxes UTP (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Income Tax Contingency [Line Items]
Balance at beginning of the year		$ 1,373	$ 1,213
Increases in positions taken in a prior period	0	30
Increases in positions taken in a current period	11	200
Decreases due to lapse of statute of limitations	(26)	(70)
Unrecognized tax benefits that would impact effective tax rate	1,358
Unrecognized tax benefits, interest	18	81
Unrecognized tax benefits, income tax penalties	$ 25	$ 66