Note 1 - Basis of Presentation and Nature of Operations (Details Textual) |
12 Months Ended |
|---|---|
Dec. 31, 2017 | |
| Number of Operating Locations | 6 |
| Concentration Risk, Percentage of Raw Material Purchases from Suppliers, Minimum Threshold | 10.00% |
| X | ||||||||||
- Definition Represents the percentage of raw material purchases from each major supplier. No definition available.
|
| X | ||||||||||
- Definition Represents the entity's number of operating locations as of the balance sheet date. No definition available.
|