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Leases (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Leases [Abstract] |  |  |
Operating Lease, Weighted Average Remaining Lease Term | 3 years 7 months 6 days | 5 years 3 months 18 days |
Operating Lease, Weighted Average Discount Rate, Percent | 10.10% | 12.50% |
Operating Lease, Right-of-Use Asset | $ 7.9 | $ 2.1 |
Operating Lease, Liability, Current | 3.3 | 0.9 |
Operating Lease, Liability, Noncurrent | 6.1 | 3.0 |
Operating Lease, Liability | 9.4 | 3.9 |
Operating Lease, Expense | (0.7) | (0.5) | $ (2.6)
Operating Lease, Expense Adjustment | (1.6) | (2.0) | (0.3)
Operating Lease, Payments | $ (1.6) | (2.4) | $ (3.2)
Operating Lease, Liability, Decrease |  | $ (1.0) |
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | Other long-term assets | Other long-term assets |
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | Accounts payable and accrued liabilities | Accounts payable and accrued liabilities |
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Other long-term liabilities | Other long-term liabilities |
Increase (Decrease) in Operating Lease Liability | $ 6.6 |  |

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- Definition Amount of increase (decrease) in obligation for operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 + Details
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
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