Purchased Intangible Assets - Net Carrying Amounts of Intangible Assets, Other than Goodwill (Detail) (USD $)	Jan. 31, 2014	Jan. 31, 2013
Finite And Indefinite Lived Intangible Assets [Line Items]
Trade name - GPS	$ 1,907,000
Totals	2,088,000	2,331,000
GPS [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Trade name - GPS	1,907,000	2,150,000
SMC [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Trade name - SMC	$ 181,000	$ 181,000