Income Taxes - Reconciliation of Expected to Actual Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Reconciliation of expected to actual income tax expense
Federal income tax at 21%	$ (2,828)	$ (1,300)
Federal income tax rate (as a percent)	21.00%	21.00%
Changes in tax rates	$ (50)	$ 50
Permanent differences	413	52
Foreign effective tax rate differential	66	(80)
Foreign withholding taxes, including penalties and interest	29	34
Tax effect of book loss on disposition of subsidiaries	0	79
Valuation allowance on deferred tax assets	2,682	1,205
Excess tax deficiency for share-based payments under ASU 2016-09	66	284
Other	158	29
Income tax expense	$ 536	$ 353