Long-Term Debt and Notes Payable - Long-Term Debt and Notes Payable (Detail) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Debt Instrument [Line Items]
Debt	$ 12,409	$ 26,355
Debt	12,409	26,355
Less current portion	(3,218)	(3,218)
Long-term debt	9,191	23,137
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt	5,500	17,000
Debt	5,500	17,000
Term Credit Facility [Member]
Debt Instrument [Line Items]
Debt	6,800	9,200
Debt	6,800	9,200
Other Equipment Notes [Member]
Debt Instrument [Line Items]
Debt	109	155
Debt	$ 109	$ 155