Other Intangible Assets (Details) (USD $)	3 Months Ended
	Apr. 30, 2013	Jan. 31, 2013
Intangible assets
Trade name - GPS, Accumulated Amortization	$ 1,554,000
Intangible assets, net, Gross Carrying Amount	3,824,000
Intangible assets, Net Amount	2,270,000	2,331,000
Trade name [Member] | GPS [Member]
Intangible assets
Trade name - GPS, Estimated Useful Life	15 years
Trade name - GPS, Gross Carrying Amount	3,643,000
Trade name - GPS, Accumulated Amortization	1,554,000
Trade name - GPS, Net Amount	2,089,000	2,150,000
Trade name [Member] | SMC [Member]
Intangible assets
Trade name - SMC, Estimated Useful Life	Indefinite
Trade name - SMC, Gross Carrying Amount	181,000
Trade name - SMC, Net Amount	$ 181,000	$ 181,000