Note 3 - Credit Losses - Credit for Trade Accounts Receivable (Details) - USD ($) $ in Thousands  | 
9 Months Ended | |
|---|---|---|
Sep. 30, 2024  | 
Sep. 30, 2023  | 
|
| Balance | $ 1,646 | $ 1,366 | 
| Additions charged to earnings | 527 | 329 | 
| Writeoffs | 0 | 0 | 
| Changes to reserve, net | 66 | (33) | 
| Balance | 2,239 | 1,662 | 
| Work Truck Attachments [Member] | ||
| Balance | 1,400 | 1,000 | 
| Additions charged to earnings | 304 | 300 | 
| Writeoffs | 0 | 0 | 
| Changes to reserve, net | (4) | 0 | 
| Balance | 1,700 | 1,300 | 
| Work Truck Solutions [Member] | ||
| Balance | 246 | 366 | 
| Additions charged to earnings | 223 | 29 | 
| Writeoffs | 0 | 0 | 
| Changes to reserve, net | 70 | (33) | 
| Balance | $ 539 | $ 362 | 
| X | ||||||||||
- Definition Amount of change to reserves for expected credit loss on accounts receivable. No definition available. 
  | 
| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
  | 
| X | ||||||||||
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- Details 
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| X | ||||||||||
- Details 
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