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Other Intangible Assets (Details) (USD $) | 6 Months Ended |
--- | --- | ---
Jul. 31, 2013 | Jan. 31, 2013
Intangible assets |  |
Trade name - GPS, Accumulated Amortization | $ 1,614,000 |
Intangible Assets Gross Excluding Goodwill | 3,824,000 |
Intangible assets, Net Amount | 2,210,000 | 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 | 1,614,000 |
Trade name - GPS, Net Amount | 2,029,000 | 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

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