Note 5 - Inventories (Details Textual)  | 
Mar. 31, 2022  | 
Dec. 31, 2021  | 
|---|---|---|
| Percentage of LIFO Inventory | 7.00% | 7.00% | 
| X | ||||||||||
- Definition The percentage of LIFO (last in first out) inventory to total inventory as of the balance sheet date if other than 100 percent. No definition available. 
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