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v3.20.2

Note 7 - Debt (Tables) | 9 Months Ended
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Sep. 30, 2020
Notes Tables |
Schedule of Debt [Table Text Block] |
|  | September 30, 2020 |  |  | December 31, 2019 |
Debt principal |  | $ | — |  |  | $ | 100 |
End-of-term debt obligation |  |  | 756 |  |  |  | 594 |
Total debt obligation |  | $ | 756 |  |  | $ | 694 |

X
- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration