Income Taxes - Income Tax Provision (Benefit) for Continuing Operations Computed Using Federal Statutory Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
Jan. 31, 2022	Jan. 31, 2021
Income Tax Disclosure [Abstract]
Statutory U.S. federal tax rate (21%)	$ (1,563)	$ (4,557)
State taxes, net of federal tax benefit	(6)	46
Losses not benefitted	1,593	4,554
Non-deductible stock compensation expense	292	22
Other non-deductible items	(642)	359
Innovative technology and development incentive	(264)	(380)
Foreign tax rate differential	70	24
Expiration of federal tax credits	1,179
Current fiscal year impact of FIN 48	(674)	(10)
Income tax (benefit) provision	$ (15)	$ 58

Expiration of federal tax credits.

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Income tax rate reconciliation, nondeductible expense (interest), other.

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Income tax reconciliation book gains (losses) not currently benefited.

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Income tax reconciliation impact of uncertain tax positions.

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Income tax reconciliation innovative technology and development incentive.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit).

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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