Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - USD ($) $ in Thousands  | 
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
Sep. 30, 2022  | 
Sep. 30, 2022  | 
Sep. 30, 2021  | 
|
| Common stock issued, transaction costs | $ 33 | $ 176 | $ 311 | 
| X | ||||||||||
- Definition The cash outflow for cost incurred directly with the issuance of an equity security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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