Note 8 - Warrant Liability - Rollforward of Fair Value (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Warrants | $ 84 | |
| Change in fair value | 39 | $ (9) |
| Exercises | (123) | |
| Warrants | $ 84 | |
| X | ||||||||||
- Definition The amount of warrant exercises during the period. No definition available.
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| X | ||||||||||
- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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