Purchased Intangible Assets - Schedule of Expected Amortization Expense (Detail) (USD $)	Jan. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
2015	$ 243,000
2016	243,000
2017	243,000
2018	243,000
2019	243,000
Thereafter	692,000
Total	$ 1,907,000