Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Income Tax Disclosure [Abstract]
Decrease in deferred income tax assets		$ 7,000,000
Repatriation of foreign earnings		11,200,000
Deferred tax assets, assets held for sale	$ 1,500,000
Deferred tax assets, stock based compensation	650,000	781,000
Valuation allowance, deferred tax assets	23,197,000	21,407,000
Tax credit carry forwards	$ 724,000
Tax credit carry forwards expiration year	2021
Unrecognized tax benefits	$ 0	0	$ 0
Excess tax deficiency for share-based payments under ASU 2016-09	$ 284,000	$ 663,000	$ 309,000