Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 357,000	$ 435,000	$ 586,000	$ 734,000
Pre-tax net loss	(5,007,000)	(9,091,000)	$ (7,443,000)	$ (15,235,000)
Effective tax rate			(7.90%)	(4.80%)
Prepaid income taxes					$ 1,565,000
Non-current prepaid income taxes	1,173,000		$ 1,173,000
Unrecognized Tax Benefit	$ 0	$ 0	$ 0	$ 0