| In millions, except per share items | Jun-30-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-K | S-1/A | 10-Q | 10-K | S-1/A |
| Cash Flows from Operating Activities: | | | | | | |
| Net loss | -19.0 | | | -4.6 | | |
| Adjustments to reconcile net loss to net cash used in operating activities | | | | | | |
| Impairment of long-lived assets | 0.6 | | | | | |
| Amortization of debt issuance costs | 0.2 | | | 0.0 | | |
| Changes in operating assets and liabilities | | | | | | |
| Net cash used in operating activities | -18.1 | | | -4.5 | | |
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| Cash Flows from Investing Activities: | | | | | | |
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| Cash Flows from Financing Activities: | | | | | | |
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| Less: Restricted cash – end of the period | | | | | | |
| Cash and cash equivalents – end of the period | 0.8 | | | | | |
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| Supplemental disclosure of non-cash operating and financing activities | | | | | | |
| Assumption of Jack Creek liabilities | | | | | | |
| Recognition of warrant liabilities | | | | | | |
| Recognition of Deferred underwriting fee | | | | | | |
| Recognition of new right-of-use asset and corresponding operating lease liability | | | | | | |
| Bonuses paid in Class A Common Stock | | | | | | |
| Deferred offering costs included in accrued expenses and other current liabilities | | | | | | |
| Issuance costs on Legacy Bridger Series C Preferred Shares | | | | | | |
| Supplemental cash flow information | | | | | | |
| Legacy Bridger Series C Preferred Shares adjustment to maximum redemption value | | | | 191.2 | | |