Other Intangible Asset (Details) (USD $)	6 Months Ended
	Jul. 31, 2012	Jan. 31, 2012
Summary of Other Intangible Asset
Trade name - GPS, Estimated Useful Life	15 years
Trade name - SMC, Estimated Useful Life	Indefinite
Trade name - GPS, Gross Carrying Amount	$ 3,643,000
Trade name - SMC, Gross Carrying Amount	181,000
Other intangible assets, Gross Carrying Amount	3,824,000
Trade name - GPS, Accumulated Amortization	(1,371,000)
Other intangible assets, Accumulated Amortization	(1,371,000)
Trade name - GPS, Net Amount	2,272,000	2,393,000
Trade name - SMC, Net Amount	181,000	181,000
Other intangible assets, Net Amount	$ 2,453,000	$ 2,574,000