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Note 2 - Revenue - Disaggregation of Revenue by Major Categories and Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net sales	$ 159,268	$ 160,466
UNITED STATES
Net sales	121,072	119,750
Non-US [Member]
Net sales	38,196	40,716
Industrial [Member]
Net sales	33,560	33,321
Fire Market [Member]
Net sales	32,289	36,105
Agriculture [Member]
Net sales	20,406	21,077
Construction [Member]
Net sales	21,482	20,847
Municipal [Member]
Net sales	20,215	17,418
Petroleum [Member]
Net sales	5,902	5,478
OEM [Member]
Net sales	8,158	9,013
Repair Parts [Member]
Net sales	17,256	17,207
Total Excluding Fill-Rrite [Member]
Net sales	$ 159,268	$ 160,466

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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