Income Taxes - Additional Information (Detail) (USD $)	9 Months Ended
	Oct. 31, 2014	Jan. 31, 2014
Income Tax Disclosure [Abstract]
Prepaid income taxes	$ 1,317,000	$ 2,177,000
Prepaid foreign taxes	1,200,000	600,000
Prepaid domestic federal and state taxes	$ 100,000	$ 1,600,000
Federal statutory rate	34.00%