| Consolidated Statements of Shareholders’ Equity (Parentheticals) - USD ($) $ in Thousands | 12 Months Ended | |
|---|---|---|
| Dec. 31, 2020 | Dec. 31, 2018 | |
| Statement of Stockholders' Equity [Abstract] | ||
| Ordinary shares and warrants | $ 50 | $ 100 | 
| X | ||||||||||
| 
- Definition Ordinary shares and warrants. No definition available. 
 | 
| X | ||||||||||
| 
- References No definition available. 
 |