Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Jan. 31, 2018
Income Tax Disclosure [Abstract]
Provision for income taxes	$ (249,000)	$ 586,000	$ 273,000	$ 1,172,000
Pre-tax net loss	5,440,000	4,695,000	15,412,000	12,138,000
Non-current prepaid income taxes	1,434,000		1,434,000		$ 1,609,000
Unrecognized tax benefit	$ 0	$ 0	$ 0	$ 0