| In millions, except per share items | Dec-31-21 | Sep-30-21 | Jun-30-21 | Dec-31-20 | Sep-30-20 | Jun-30-20 | Mar-31-20 |
| | 20-F | 6-K | 6-K | 20-F | 6-K | 6-K | 6-K |
| Revenue | | | | 0.2 | | | |
| Operating expenses | | | | | | | |
| Loss from operations | | | | -64.2 | | | |
| Loss before income tax | | | | -63.8 | | | |
| Net loss | | | | -63.8 | | | |
| Less: Net loss attributable to noncontrolling interests | | | | -2.8 | | | |
| Net loss attributable to BeyondSpring Inc. | | | | -61.0 | | | |
| |
| Net loss per share | | | | | | | |
| Basic and diluted (in dollars per share) | | | | ($2.04) | | | |
| |
| Weighted average shares outstanding | | | | | | | |
| Basic and diluted (in shares) | | | | 29.0 | | | |
| |
| Other comprehensive loss, net of tax of nil: | | | | | | | |
| Foreign currency translation adjustment gain (loss) | | | | -0.5 | | | |
| |
| Comprehensive loss | | | | | | | |
| Less: Comprehensive loss attributable to noncontrolling interests | | | | | | | |
| Comprehensive loss attributable to BeyondSpring Inc. | | | | -61.4 | | | |