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Note 9 - Income Taxes - Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Mar. 31, 2023
--- | --- | ---
Future tax credits | $ 4,884 | $ 5,007
Inventory valuation | 9,951 | 8,364
Employee benefits | 2,739 | 2,335
Insurance | 922 | 471
State depreciation basis differences | 3,344 | 3,218
Operating leases | 190 | 942
Intangibles | 2,760 | 1,514
Pension and post-?retirement benefits | 8,734 | 7,117
Interest | 18 | 8
Deferred revenue | 260 | 296
Net operating loss and other tax attribute carryovers | 558 | 1,233
Other | 427 | 327
Total assets | 34,787 | 30,832
Valuation allowance - noncurrent | (4,884) | (5,007)
Total deferred income tax assets, net | 29,903 | 25,825
Property basis and depreciation difference | 25,260 | 26,450
Inventory reserve | 3,091 | 2,101
Right-of-use assets | 3,971 | 7,045
Pension | 21,682 | 21,528
Other | 219 | 182
Total liabilities | (54,223) | (57,306)
Deferred income tax liability, net | $ (24,320) | $ (31,481)

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