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Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Revenue | $ 159,806 | $ 166,100 | $ 187,561 | $ 102,601 | $ 152,945 | $ 127,636 | $ 157,530 | $ 103,342 | $ 616,068 | $ 541,453 | $ 480,154
Contract liabilities, balance |  |  |  | $ 2,454 |  |  |  | $ 2,746 | 2,454 | 2,746 |
Additions |  |  |  |  |  |  |  |  | 20,511 | 17,205 |
Deductions |  |  |  |  |  |  |  |  | (18,434) | (17,497) |
Contract liabilities, balance | $ 4,531 |  |  |  | $ 2,454 |  |  |  | 4,531 | 2,454 | 2,746
Transferred at Point in Time [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 527,318 | 463,611 | 402,513
Transferred over Time [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 88,750 | 77,842 | 77,641
Work Truck Attachments [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 382,296 | 325,707 | 252,838
Work Truck Attachments [Member] | Transferred at Point in Time [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 382,296 | 325,707 | 252,838
Work Truck Attachments [Member] | Transferred over Time [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 0 | 0 | 0
Work Truck Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 233,772 | 215,746 | 227,316
Work Truck Solutions [Member] | Transferred at Point in Time [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 145,022 | 137,904 | 149,675
Work Truck Solutions [Member] | Transferred over Time [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 88,750 | 77,842 | 77,641
Independent Dealer [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 502,196 | 447,056 | 367,030
Independent Dealer [Member] | Work Truck Attachments [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 382,296 | 325,707 | 252,838
Independent Dealer [Member] | Work Truck Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 119,900 | 121,349 | 114,192
Government Contract [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 56,319 | 46,107 | 62,762
Government Contract [Member] | Work Truck Attachments [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 0 | 0 | 0
Government Contract [Member] | Work Truck Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 56,319 | 46,107 | 62,762
Fleet [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 49,094 | 38,669 | 42,590
Fleet [Member] | Work Truck Attachments [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 0 | 0 | 0
Fleet [Member] | Work Truck Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 49,094 | 38,669 | 42,590
Product and Service, Other [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 8,459 | 9,621 | 7,772
Product and Service, Other [Member] | Work Truck Attachments [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 0 | 0 | 0
Product and Service, Other [Member] | Work Truck Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 8,459 | $ 9,621 | $ 7,772

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