Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 4,155,000	$ 5,594,000	$ 4,320,000
Goodwill impairment	3,000,000
Impairment of intangible assets	3,609,000
Aggregate amortization expense	1,700,000	$ 1,400,000	$ 660,000
Equipment Leasing [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	$ 600,000
Klein Associates Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill				$ 1,662,000
Other intangible assets				$ 2,400,000