Note 8 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Income Tax Expense (Benefit)	$ 670,000	$ 672,000	$ 964,000	$ 917,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	2,599,000	1,470,000	$ 1,923,000	2,669,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	0		$ 0
Unrecognized Tax Benefits	$ 0	$ 0	$ 0	$ 0
Domestic Tax Jurisdiction [Member]
Open Tax Year			2019 2020 2021 2022 2023 2024
State and Local Jurisdiction [Member]
Open Tax Year			2017 2018 2019 2020 2021 2022 2023 2024
Foreign Tax Jurisdiction [Member] \| SINGAPORE
Open Tax Year			2017 2018 2019 2020 2021 2022 2023 2024
Foreign Tax Jurisdiction [Member] \| Other Countries [Member]
Open Tax Year			2018 2019 2020 2021 2022 2023 2024

Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of foreign subsidiaries.

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