Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2015	Jan. 31, 2015
Income Tax Disclosure [Abstract]
Prepaid income taxes	$ 528,000	$ 528,000	$ 1,018,000
Prepaid foreign taxes	440,000	440,000	900,000
Prepaid domestic federal and state taxes	88,000	88,000	$ 100,000
Deferred tax asset	$ 867,000	$ 1,100,000
Federal statutory rate	34.00%	34.00%
Recognized tax benefits	$ 92,000	$ 92,000
Reversed potential penalties and interest		$ 144,000