Note 2 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue from Contract with Customer, Excluding Assessed Tax	$ 166,100	$ 127,636	$ 456,262	$ 388,508
Contract with Customer, Asset, after Allowance for Credit Loss, Total	0	0	0	0
Contract with Customer, Liability, Revenue Recognized	630	601	1,691	2,746
Fleet Upfit Sales [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 898	$ 92	$ 983	$ 168