Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Apr. 30, 2016	Jan. 31, 2016
Income Tax Disclosure [Abstract]
Prepaid income taxes	$ 1,409,000	$ 2,523,000
Prepaid foreign taxes	1,200,000	2,300,000
Prepaid domestic federal and state taxes	187,000	182,000
Valuation allowance, deferred tax assets	$ 18,400,000	$ 16,700,000
Federal statutory rate	34.00%	34.00%
Unrecognized Tax Benefit	$ 0	$ 92,000
Reversed potential penalties and interest		$ 144,000