Note 3 - Significant Accounting Policies - Plant and Equipment, Expected Useful Lives (Details) |
12 Months Ended |
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Dec. 31, 2017 | |
| Building [Member] | Minimum [Member] | |
| Property and equipment, useful lives (Year) | 5 years |
| Building [Member] | Maximum [Member] | |
| Property and equipment, useful lives (Year) | 20 years |
| Machinery and Equipment [Member] | Minimum [Member] | |
| Property and equipment, useful lives (Year) | 7 years |
| Machinery and Equipment [Member] | Maximum [Member] | |
| Property and equipment, useful lives (Year) | 15 years |
| Office Equipment [Member] | |
| Property and equipment, useful lives (Year) | 7 years |
| Computer Equipment [Member] | |
| Property and equipment, useful lives (Year) | 3 years |
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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