Purchased Intangible Assets (Details Textual) (USD $)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Purchased Intangible Assets (Textual) [Abstract]
Goodwill	$ 18,476,000	$ 18,476,000
Goodwill allocated to GPS for income tax reporting purposes	12,300,000
Period of amortization of goodwill for income tax purpose	15 years
Non-compete GPS, Estimated Useful	5 years	5 years
Trade name - GPS, Estimated Useful Life	15 years	15 years
Trade name - SMC, Estimated Useful Life	Indefinite	Indefinite
Amounts of accumulated amortization associated with the trade name of GPS	$ 1,493,000	$ 1,250,000