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Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Accounts Receivable, Allowance for Credit Loss | $ 700 | $ 500 |
Percentage of LIFO Inventory | 66.00% | 68.00% |
Depreciation | $ 15,900 | $ 13,300 | $ 11,200
Goodwill, Impairment Loss | 0 | 0 | 0
Advertising Expense | $ 4,300 | 3,300 | 1,900
Restricted Stock Units (RSUs) [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period | 3 years |  |
Performance Shares and RSUs[Member] |  |  |
Share-Based Payment Arrangement, Expense | $ 3,300 | $ 3,000 | $ 2,000
Customer Concentration Risk [Member] | Revenue Benchmark [Member] |  |  |
Number of Major Customers | 0 | 0 | 0

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