Goodwill and Intangible Assets (Details Textual) (USD $)	3 Months Ended		12 Months Ended
	Apr. 30, 2013 Indicators	Apr. 30, 2012 Indicators	Jan. 31, 2013
Goodwill and Intangible Assets (Textual) [Abstract]
Consideration	$ 1,513,000	$ 100,000
Goodwill and Intangible Assets (Additional Textual) [Abstract]
Changes in the carrying amount of goodwill	0
Indicators of Impairment of Goodwill	0	0
Total Consideration			5,400,000
Impairment charges	0	0
Estimated useful life	3 years
Licensed Technology [Member]
Goodwill and Intangible Assets (Textual) [Abstract]
Consideration	1,400,000		4,000,000
Integration cost			$ 100,000