Nature of Business and Basis of Presentation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2012	Apr. 30, 2012 Cost Of Revenue Product [Member]	Apr. 30, 2012 Cost Of Revenue Service [Member]	Apr. 30, 2012 Research and Development [Member]	Apr. 30, 2012 Selling and Marketing [Member]	Apr. 30, 2013 General and Administrative [Member]
Prior Period Reclassification Adjustment	$ 0	$ (54)	$ (239)	$ (182)	$ (40)	$ 515