Note 12 - Share-based Compensation - Share-based Compensation Expense (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Total share-based compensation | $ 620 | $ 409 |
| Research and Development Expense [Member] | ||
| Total share-based compensation | 170 | 60 |
| General and Administrative Expense [Member] | ||
| Total share-based compensation | $ 450 | $ 349 |
| X | ||||||||||
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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