Other Intangible Assets - Intangible Assets (Detail) (USD $)	3 Months Ended
	Apr. 30, 2015	Jan. 31, 2015
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible Assets Gross Excluding Goodwill	$ 3,824,000
Trade name - GPS, Accumulated Amortization	2,039,000
Intangible assets, Net Amount	1,785,000	1,845,000
Trade Name [Member] | SMC [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Trade name - SMC, Estimated Useful Life	Indefinite
Trade name - SMC, Net Amount	181,000	181,000
Trade name - SMC, Gross Carrying Amount	181,000
Trade Name [Member] | GPS [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Trade name - GPS, Estimated Useful Life	15 years
Trade name - GPS, Gross Carrying Amount	3,643,000
Trade name - GPS, Accumulated Amortization	2,039,000
Trade name - GPS, Net Amount	$ 1,604,000	$ 1,664,000