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Note 7 - Share-based Compensation (Details) - Summary of the Status of the RSU Plan (Restricted Stock Units (RSUs) [Member], USD $)
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12 Months Ended |
|---|---|
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Dec. 31, 2014
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Restricted Stock Units (RSUs) [Member]
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| Note 7 - Share-based Compensation (Details) - Summary of the Status of the RSU Plan [Line Items] | |
| Outstanding | 191,613 |
| Outstanding | $ 1.76 |
| Expected to vest at December 31, 2014 | 163,204 |
| Expected to vest at December 31, 2014 | $ 1.90 |
| Granted | 81,695 |
| Granted | $ 3.06 |
| Converted | (110,104) |
| Converted | $ 3.47 |
| Outstanding | 163,204 |
| Outstanding | $ 1.90 |