| Disaggregation of Revenue [Table Text Block] | 
| Three Months Ended March 31, 2023 |  | Work Truck Attachments |  |  | Work Truck Solutions |  |  | Total Revenue |  |  
| Independent dealer |  | $ | 19,246 |  |  | $ | 30,512 |  |  | $ | 49,758 |  |  
| Government |  |  | - |  |  |  | 17,590 |  |  |  | 17,590 |  |  
| Fleet |  |  | - |  |  |  | 12,868 |  |  |  | 12,868 |  |  
| Other |  |  | - |  |  |  | 2,329 |  |  |  | 2,329 |  |  
| Total revenue |  | $ | 19,246 |  |  | $ | 63,299 |  |  | $ | 82,545 |  |  
| Three Months Ended March 31, 2022 |  | Work Truck Attachments |  |  | Work Truck Solutions |  |  | Total Revenue |  |  
| Independent dealer |  | $ | 45,776 |  |  | $ | 30,251 |  |  | $ | 76,027 |  |  
| Government |  |  | - |  |  |  | 12,010 |  |  |  | 12,010 |  |  
| Fleet |  |  | - |  |  |  | 11,723 |  |  |  | 11,723 |  |  
| Other |  |  | - |  |  |  | 2,841 |  |  |  | 2,841 |  |  
| Total revenue |  | $ | 45,776 |  |  | $ | 56,825 |  |  | $ | 102,601 |  |  
| Three Months Ended March 31, 2023 |  | Work Truck Attachments |  |  | Work Truck Solutions |  |  | Total Revenue |  |  
| Point in time |  | $ | 19,246 |  |  | $ | 40,720 |  |  | $ | 59,966 |  |  
| Over time |  |  | - |  |  |  | 22,579 |  |  |  | 22,579 |  |  
| Total revenue |  | $ | 19,246 |  |  | $ | 63,299 |  |  | $ | 82,545 |  |  
| Three Months Ended March 31, 2022 |  | Work Truck Attachments |  |  | Work Truck Solutions |  |  | Total Revenue |  |  
| Point in time |  | $ | 45,776 |  |  | $ | 34,483 |  |  | $ | 80,259 |  |  
| Over time |  |  | - |  |  |  | 22,342 |  |  |  | 22,342 |  |  
| Total revenue |  | $ | 45,776 |  |  | $ | 56,825 |  |  | $ | 102,601 |  |  
| Three Months Ended March 31, 2023 |  | Balance at Beginning of Period |  |  | Additions |  |  | Deductions |  |  | Balance at End of Period |  |  
| Contract liabilities |  | $ | 4,531 |  |  | $ | 3,374 |  |  | $ | (5,061 | ) |  | $ | 2,844 |  |  
| Three Months Ended March 31, 2022 |  | Balance at Beginning of Period |  |  | Additions |  |  | Deductions |  |  | Balance at End of Period |  |  
| Contract liabilities |  | $ | 2,454 |  |  | $ | 2,709 |  |  | $ | (2,547 | ) |  | $ | 2,616 |  |  |