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Note 2 - Summary of Significant Accounting Policies (Details Textual) |  | 12 Months Ended |
--- | --- | --- | ---
May 19, 2022 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jun. 13, 2019 USD ($)
Financing Receivable, Allowance for Credit Loss, Ending Balance |  | $ 1,366,000 | $ 2,970,000 | $ 2,929,000 |
Accounts Receivable, Allowance for Credit Loss, Ending Balance |  | 0 |  |  |
Financing Program Purchases of Distributors Financed |  | 15,782,000 | 10,524,000 | 7,628,000 |
Financing Program, Amount Owed By Distributors |  | 16,089,000 | 8,281,000 |  |
Financing Program, Repossessed Inventory Required To Be Repurchased |  | 0 | 0 | 0 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax |  | (1,163,000) | 568,000 |  |
Interest Expense, Debt, Total |  | 476,000 | 1,760,000 |  |
Gains Losses on Derivatives Expected to Be Amortized from OCITO Earnings |  | 687,000 | 687,000 |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total |  | 9,128,000 | (1,053,000) | (5,495,000) |
Truck Floor Plan Inventories, Net |  | 1,211,000 | 2,655,000 |  |
Bailment Pool Chassis Inventories, Net |  | $ 7,847,000 | 8,439,000 |  |
Number of Companies Upfit and Distribution Centers Subject to Lease Agreements |  | 16 |  |  |
Number of Operating Lease Facilities Impaired |  | 2 |  |  |
Asset Impairment Charges, Total |  | $ 0 | 1,211,000 | 127,872,000 |
Depreciation, Total |  | 10,418,000 | 9,634,000 | 8,806,000 |
Cost of Property Repairs and Maintenance |  | $ 6,750,000 | 5,974,000 | 6,089,000 |
Number of Reporting Units |  | 4 |  |  |
Number of Reportable Segments |  | 2 |  |  |
Goodwill, Ending Balance |  | $ 113,134,000 | 113,134,000 |  |
Intangible Assets, Gross (Excluding Goodwill), Total |  | 273,755,000 | 273,755,000 |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | 142,166,000 | 131,646,000 |  |
Finite-Lived Intangible Assets, Gross, Total |  | 196,155,000 | 196,155,000 |  |
Advertising Expense |  | 4,699,000 | 3,884,000 | 3,437,000 |
Research and Development Expense, Total |  | $ 12,159,000 | 10,152,000 | 6,679,000 |
Number of Operating Segments |  | 2 |  |  |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |  |  |  |
Derivative Liability, Current |  | $ 4,120,000 | 3,479,000 |  |
Derivative Liability, Noncurrent |  | 2,919,000 | 2,949,000 |  |
Distribution Rights [Member] |  |  |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | 75,000,000 | 71,000,000 |  |
Finite-Lived Intangible Assets, Gross, Total |  | $ 80,000,000 | 80,000,000 |  |
Distribution Rights [Member] | Minimum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 15 years |  |  |
Distribution Rights [Member] | Maximum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 20 years |  |  |
Trademarks [Member] |  |  |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 3,995,000 | 3,901,000 |  |
Finite-Lived Intangible Assets, Gross, Total |  | $ 5,459,000 | 5,459,000 |  |
Trademarks [Member] | Minimum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 7 years |  |  |
Trademarks [Member] | Maximum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 25 years |  |  |
Patents [Member] |  |  |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 16,994,000 | 15,739,000 |  |
Finite-Lived Intangible Assets, Gross, Total |  | $ 21,136,000 | 21,136,000 |  |
Patents [Member] | Minimum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 7 years |  |  |
Patents [Member] | Maximum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 20 years |  |  |
Customer Relationships [Member] |  |  |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 37,537,000 | 32,366,000 |  |
Finite-Lived Intangible Assets, Gross, Total |  | $ 80,920,000 | 80,920,000 |  |
Customer Relationships [Member] | Minimum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 15 years |  |  |
Customer Relationships [Member] | Maximum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 19 years 6 months |  |  |
Noncompete Agreements [Member] |  |  |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 8,640,000 | 8,640,000 |  |
Finite-Lived Intangible Assets, Gross, Total |  | $ 8,640,000 | 8,640,000 |  |
Noncompete Agreements [Member] | Minimum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 4 years |  |  |
Noncompete Agreements [Member] | Maximum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 5 years |  |  |
Municipal Reporting Unit [Member] |  |  |  |  |
Goodwill, Impairment Loss |  |  |  | 47,799,000 |
Dejana Reporting Unit [Member] |  |  |  |  |
Goodwill, Impairment Loss |  |  |  | 80,073,000 |
Indefinite-Lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure |  | $ 17,100,000 |  |  |
Dejana Reporting Unit [Member] | Trade Names [Member] |  |  |  |  |
Indefinite-Lived Intangible Assets (Excluding Goodwill), Ending Balance |  | $ 14,000,000 |  |  |
Leasehold Improvements [Member] |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  | 12 years |  |  |
Interest Rate Swap Effective May 31, 2019 Through May 31, 2024 [Member] |  |  |  |  |
Derivative Liability, Notional Amount |  | $ 175,000,000 |  |  | $ 175,000,000
Derivative, Fixed Interest Rate |  | 2.495% |  |  |
Interest Rate Swap [Member] |  |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax |  | $ (1,163,000) | 568,000 |  |
Interest Expense, Debt, Total |  | 476,000 | 1,760,000 |  |
Derivative, Notional Amount | $ 125,000 | $ 125,000,000 |  |  |
Derivative, Nonmonetary Notional Amount, Flow Rate, Percentage | 2.718% | 2.718% |  |  |
Derivative Liability, Total |  | $ 5,208,000 | 4,756,000 |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total |  | 6,115,000 | 3,524,000 |  |
Work Truck Attachments [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance |  | 1,000,000 | 1,430,000 | 1,480,000 |
Accounts Receivable, Allowance for Credit Loss, Ending Balance |  | 1,000,000 | 1,430,000 |  |
Goodwill, Ending Balance |  | 113,132,000 | 113,132,000 |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | 104,196,000 | 98,803,000 |  |
Finite-Lived Intangible Assets, Gross, Total |  | 177,765,000 | 177,765,000 |  |
Work Truck Solutions [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance |  | 366,000 | 1,540,000 | $ 1,449,000 |
Accounts Receivable, Allowance for Credit Loss, Ending Balance |  | $ 366,000 | 1,540,000 |  |
Number of Reportable Segments |  | 2 |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 37,970,000 | 32,843,000 |  |
Finite-Lived Intangible Assets, Gross, Total |  | 95,990,000 | $ 95,990,000 |  |
Revision of Prior Period, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | Work Truck Attachments [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance |  | 400,000 |  |  |
Revision of Prior Period, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | Work Truck Solutions [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance |  | $ 350,000 |  |  |

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