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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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