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Other Intangible Asset (Details) (USD $)
 9 Months Ended
Oct. 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 1,432,000  
Other intangible assets, Accumulated Amortization 1,432,000  
Trade name - GPS, Net Amount 2,211,000 2,393,000
Trade name - SMC, Net Amount 181,000 181,000
Other intangible assets, Net Amount $ 2,392,000 $ 2,574,000