| In millions, except per share items | Mar-31-23 | Sep-30-22 | Mar-31-22 | Sep-30-21 |
| | 10-Q | 10-Q | 10-Q | 10-Q |
| Cash flows from operating activities: | | | | |
| Net income | 0.7 | 0.2 | 1.4 | |
| Adjustments to reconcile net income to net cash used in operating activities: | | | | |
| Change in fair value of derivative forward purchase liability | 0.0 | -0.5 | 0.2 | |
| Change in fair value of warrant liabilities | -0.3 | | -1.7 | |
| Income from investments held in trust account | | | | |
| Changes in operating assets and liabilities: | | | | |
| Prepaid expenses | 0.0 | | 0.0 | |
| Accounts payable and accrued liabilities | 0.3 | | -0.2 | |
| Income tax payable | 0.3 | | | |
| Related party promissory note accrued interest | 0.0 | | | |
| Net cash used in operating activities | -0.3 | 0.2 | -0.4 | |
| |
| Cash flows from investing activities: | | | | |
| Cash deposited in Trust Account | -1.2 | | | |
| Net cash used in investing activities | -1.2 | | | |
| |
| Cash flows from financing activities: | | | | |
| Proceeds from issuance of warrants to Sponsor | 1.2 | | | |
| Proceeds from promissory notes from related parties | 0.2 | | | |
| Repayment of related party promissory note | -0.1 | | | |
| Proceeds from the sale of marketable securities | 0.2 | | | |
| Net cash provided by financing activities | 1.5 | | | |
| Net increase (decrease) in cash | 0.0 | | -0.4 | |
| |
| Supplemental Disclosures of Noncash Financing Activities | | | | |
| Remeasurement of Class A shares subject to redemption | 2.2 | | | |
| Share issuance obligation | 0.0 | | | |