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Note 6 - Fair Value Measurement and Financial Instruments (Details) - Fair Value Reconciliation of Stock-based Compensation Liability (USD $)
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12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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| Liabilities: | ||
| Liabilities, Fair Value | $ 202,000 | |
| Calculation of initial stock-based compensation liability fair value | 163,000 | |
| Change in fair value of stock-based compensation liability recorded as an adjustment to contributed surplus | (180,000) | 39,000 |
| Liabilities, Fair Value | 202,000 | |
| Stock-based Compensation Liability [Member] | ||
| Liabilities: | ||
| Liabilities, Fair Value | 202,000 | |
| Change in fair value of stock-based compensation liability recorded as an adjustment to contributed surplus | (180,000) | |
| Liabilities, Fair Value | $ 22,000 | |