| In millions, except per share items | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q/A | 10-Q | 10-Q |
| Statements of Operations [Abstract] | | | |
| General and administrative expenses | 1.7 | 1.0 | 3.8 |
| Loss from operations | -1.7 | -1.0 | -3.8 |
| |
| Other loss: | | | |
| Interest earned on investments held in Trust Account | 0.0 | 0.0 | 0.0 |
| Change in fair value of warrant liabilities | -6.4 | -36.2 | 8.4 |
| Total other loss, net | -6.4 | -36.2 | 8.4 |
| Net loss | -8.1 | -37.1 | 4.6 |
| |
| Weighted average shares outstanding, basic (in shares) | | | |
| Weighted average shares outstanding, diluted (in shares) | | | |
| Basic net loss per share (in dollars per share) | | | |
| Diluted net loss per share (in dollars per share) | | | |