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Note 2 - Revenue - Disaggregation of Revenue by Major Categories and Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net sales	$ 168,182	$ 167,456	$ 496,963	$ 498,946
UNITED STATES
Net sales	124,434	127,132	366,030	375,170
Non-US [Member]
Net sales	43,748	40,324	130,933	123,776
Industrial [Member]
Net sales	30,939	34,777	99,054	103,886
Fire Market [Member]
Net sales	31,591	35,986	92,742	109,211
Agriculture [Member]
Net sales	20,496	21,235	62,282	65,292
Construction [Member]
Net sales	22,255	23,388	65,592	66,723
Municipal [Member]
Net sales	24,279	18,841	70,668	55,831
Petroleum [Member]
Net sales	7,004	5,801	18,351	16,440
OEM [Member]
Net sales	11,579	9,730	31,420	28,223
Repair Parts [Member]
Net sales	20,039	17,698	56,854	53,340
Total Excluding Fill-Rrite [Member]
Net sales	$ 168,182	$ 167,456	$ 496,963	$ 498,946

X

- Definition

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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