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Description of business and basis of presentation (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) segment | Jun. 30, 2020 USD ($) segment | Dec. 31, 2020 USD ($)
Interim Consolidated Financial Information |  |  |  |
Number of operating segments |  | 2 |  |
Amount of total benefit | $ |  |  | $ 1,152 |
Retained earnings | $ |  | $ 49,303 |  | $ 47,712
Number of reporting units |  | 3 |  |
Number of reportable segments |  | 2 |  |
Dejana Reporting Unit |  |  |  |
Interim Consolidated Financial Information |  |  |  |
Goodwill impairment | $ | $ 80,073 |  | 80,073 |
Municipal Reporting Unit |  |  |  |
Interim Consolidated Financial Information |  |  |  |
Goodwill impairment | $ | $ 47,799 |  | $ 47,799 |
Work Truck Attachments segment |  |  |  |
Interim Consolidated Financial Information |  |  |  |
Number of reportable segments |  |  | 1 |
Work Truck Solutions |  |  |  |
Interim Consolidated Financial Information |  |  |  |
Number of reportable segments |  |  | 2 |

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