Note 7 - Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
U.S. Federal NOL carryforward	$ 7,197	$ 8,424
Deferred compensation	276	350
Research tax credit	2,258	2,573
Foreign NOL carryforward	318	448
Foreign tax credit	2,580	2,580
Stock compensation	43	62
Other accruals not yet deducted	305	276
State NOL carryforward	2,744	2,730
Accrued commissions and incentives	851	483
Inventory valuation allowance	107	116
Lease liability	278	418
Other	165	17
Deferred tax assets, gross	17,122	18,477
Valuation allowance	(15,993)	(16,905)
Total deferred tax assets, net of valuation allowances	1,129	1,572
Depreciation	(415)	(643)
Foreign subsidiaries unremitted earnings	(591)	(231)
Prepaid	(70)	(54)
Accrued pension	0	(159)
Right of use asset	(266)	(386)
Total deferred tax liabilities	(1,342)	(1,473)
Deferred tax (liability)/asset, net	(213)	(99)
Deferred tax (liability)/asset, net	213	99
Long-term assets	696	811
Long-term liability	$ (909)	$ (712)

Amount of deferred tax liability attributable to taxable temporary differences from lease liability.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiary and other recognized entity not within country of domicile. Includes, but is not limited to, other basis differences.

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