Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Income Tax Disclosure [Abstract]
Income tax benefit	$ (109)	$ 31	$ 79	$ 75
Pre-tax net loss	$ 2,261	$ 1,350	$ 10,772	$ 5,084