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Note 2 - Revenue - Disaggregation of Revenue by Major Categories and Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net sales	$ 169,513	$ 171,024	$ 328,781	$ 331,490
UNITED STATES
Net sales	127,021	128,289	241,596	248,039
Non-US [Member]
Net sales	42,492	42,735	87,185	83,451
Industrial [Member]
Net sales	34,570	35,762	68,130	69,077
Fire Market [Member]
Net sales	28,959	36,935	61,249	73,074
Agriculture [Member]
Net sales	21,381	22,980	41,787	44,057
Construction [Member]
Net sales	21,907	22,436	43,389	43,273
Municipal [Member]
Net sales	26,206	19,549	46,419	36,973
Petroleum [Member]
Net sales	5,451	5,160	11,353	10,634
OEM [Member]
Net sales	11,684	9,480	19,842	18,490
Repair Parts [Member]
Net sales	19,355	18,722	36,612	35,912
Total Excluding Fill-Rrite [Member]
Net sales	$ 169,513	$ 171,024	$ 328,781	$ 331,490

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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