Purchased Intangible Assets (Details) (USD $)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Summary of Other Intangible Asset
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
Non-compete GPS, Net Amount, Beginning Balance		$ 91,000
Trade name - GPS, Net Amount, Beginning Balance	2,393,000	2,636,000
Trade name - SMC, Net Amount , Beginning Balance	181,000	181,000
Non-compete GPS, Additions
Trade name GPS, Additions
Trade name SMC, Additions
Additions, Total
Non-compete GPS, Amortization		91,000
Trade name, Amortization	243,000	243,000
Total, Amortization	243,000	334,000
Non-compete GPS, Net Amount, Ending Balance
Trade name - GPS, Net Amount, Ending Balance	2,150,000	2,393,000
Trade name - SMC, Net Amount , Ending Balance	181,000	181,000
Totals	$ 2,331,000	$ 2,574,000	$ 2,908,000