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Note 10 - Income Taxes (Tables) | 12 Months Ended
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Mar. 31, 2023
Notes Tables |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | Fiscal Year: |
|  | 2023 |  |  | 2022 |  |  | 2021 |
|  | (Restated) |  |  | (Restated) |  |  |  |  |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 5,819 |  |  | $ | 3,454 |  |  | $ | 13,121 |
State |  |  | 2,277 |  |  |  | 3,107 |  |  |  | 4,145 |
Total |  |  | 8,096 |  |  |  | 6,561 |  |  |  | 17,266 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | (3,886 | ) |  | $ | 7,084 |  |  | $ | 13,486 |
State |  |  | 352 |  |  |  | 50 |  |  |  | 3,164 |
Total |  |  | (3,534 | ) |  |  | 7,134 |  |  |  | 16,650 |
Total income taxes |  | $ | 4,562 |  |  | $ | 13,695 |  |  | $ | 33,916 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | Fiscal Year: |
|  | 2023 |  |  | 2022 |  |  | 2021 |
|  | (Restated) |  |  | (Restated) |  |  |  |  |
Computed (expected tax rate) |  |  | 21.0 | % |  |  | 21.0 | % |  |  | 21.0 | %
State income taxes (net of federal tax benefit) |  |  | 4.1 | % |  |  | 3.7 | % |  |  | 3.1 | %
Federal credits |  |  | -3.9 | % |  |  | -0.9 | % |  |  | -0.3 | %
State rate changes |  |  | 2.8 | % |  |  | 0.3 | % |  |  | 0.0 | %
State credit expiration |  |  | 2.1 | % |  |  | 0.9 | % |  |  | 0.0 | %
Change in valuation allowance |  |  | 7.8 | % |  |  | -1.2 | % |  |  | 0.2 | %
Federal return to accrual |  |  | -0.3 | % |  |  | -1.0 | % |  |  | 0.0 | %
State return to accrual |  |  | -0.6 | % |  |  | 0.1 | % |  |  | 0.0 | %
Permanent differences |  |  | 0.8 | % |  |  | 0.2 | % |  |  | 0.0 | %
Federal net operating loss (NOL) carryback rate difference |  |  | 0.0 | % |  |  | 0.0 | % |  |  | -2.8 | %
Interest received on federal NOL carryback |  |  | 0.0 | % |  |  | -0.3 | % |  |  | -0.2 | %
Uncertain tax benefits return to accrual |  |  | 0.0 | % |  |  | 0.3 | % |  |  | 0.0 | %
Other |  |  | -0.7 | % |  |  | -0.2 | % |  |  | 0.2 | %
Effective income tax rate |  |  | 33.1 | % |  |  | 22.9 | % |  |  | 21.2 | %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | As of: |
|  | March 31, |  |  | March 31, |
|  | 2023 |  |  | 2022 |
|  | (Restated) |  |  | (Restated) |
Deferred income tax assets: |  |  |  |  |  |  |  |
Future tax credits |  | $ | 5,007 |  |  | $ | 5,245 |
Inventory valuation |  |  | 8,364 |  |  |  | 3,024 |
Employee benefits |  |  | 2,335 |  |  |  | 2,191 |
Insurance |  |  | 471 |  |  |  | 345 |
State depreciation basis differences |  |  | 3,218 |  |  |  | - |
Operating leases |  |  | 942 |  |  |  | - |
Intangibles |  |  | 1,514 |  |  |  | - |
Other comprehensive loss |  |  | 7,117 |  |  |  | 8,975 |
Interest |  |  | 8 |  |  |  | 3 |
Prepaid revenue |  |  | 296 |  |  |  | 374 |
Net operating loss and other tax attribute carryovers |  |  | 1,233 |  |  |  | 614 |
Other |  |  | 327 |  |  |  | - |
Total assets |  |  | 30,832 |  |  |  | 20,771 |
Deferred income tax liabilities: |  |  |  |  |  |  |  |
Property basis and depreciation difference |  |  | 26,450 |  |  |  | 21,805 |
Inventory reserve |  |  | 2,101 |  |  |  | - |
Intangibles |  |  | - |  |  |  | 17 |
Right-of-use assets |  |  | 7,045 |  |  |  | 5,764 |
Pension |  |  | 21,528 |  |  |  | 21,253 |
Other |  |  | 182 |  |  |  | 1,017 |
Total liabilities |  |  | 57,306 |  |  |  | 49,856 |
Valuation allowance - noncurrent |  |  | 5,007 |  |  |  | 3,931 |
Deferred income tax liability, net |  | $ | (31,481 | ) |  | $ | (33,016 | )
Summary of Income Tax Contingencies [Table Text Block] |
|  | As of: |
|  | March 31, |  |  | March 31, |
|  | 2023 |  |  | 2022 |
|  | (Restated) |  |  | (Restated) |
Beginning balance |  | $ | 655 |  |  | $ | 376 |
Tax positions related to current year: |  |  |  |  |  |  |  |
Additions |  |  | 96 |  |  |  | 139 |
Tax positions related to prior years: |  |  |  |  |  |  |  |
Additions |  |  | - |  |  |  | 215 |
Reductions |  |  | - |  |  |  | - |
Lapses in statues of limitations |  |  | (9 | ) |  |  | (75 | )
Ending balance |  | $ | 742 |  |  | $ | 655 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 9 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-9 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 12 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15A Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 19 -SubTopic 10 -Topic 740 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-19 + Details
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