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Basis of Presentation and Nature of Operations (Details) $ / shares in Units, $ in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($) network location $ / shares shares	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) shares	Oct. 08, 2025 USD ($)	Jan. 19, 2024 CAD ($)	Jun. 23, 2023 USD ($)
Basis of Presentation and Nature of Operations [Abstract]
Long-term debt	$ 568.0		$ 550.0
Operating revenues	527.9	$ 460.1
Auction Fees \| Revision of Prior Period, Reclassification, Adjustment [Member]
Basis of Presentation and Nature of Operations [Abstract]
Operating revenues		(125.2)
Auction and Related Fees
Basis of Presentation and Nature of Operations [Abstract]
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Auction and Related Fees \| Revision of Prior Period, Reclassification, Adjustment [Member]
Basis of Presentation and Nature of Operations [Abstract]
Operating revenues		198.9
Service Revenue \| Revision of Prior Period, Reclassification, Adjustment [Member]
Basis of Presentation and Nature of Operations [Abstract]
Operating revenues		(140.3)
SaaS and Other Revenue
Basis of Presentation and Nature of Operations [Abstract]
Operating revenues	$ 67.5	66.6
SaaS and Other Revenue \| Revision of Prior Period, Reclassification, Adjustment [Member]
Basis of Presentation and Nature of Operations [Abstract]
Operating revenues		$ 66.6
Marketplace
Basis of Presentation and Nature of Operations [Abstract]
Number of vehicle logistics center locations (Canada) \| network	14
Finance
Basis of Presentation and Nature of Operations [Abstract]
Number of floorplan financing locations \| location	90
Series A Preferred Stock [Member]
Basis of Presentation and Nature of Operations [Abstract]
Series A Preferred Stock par value per share \| $ / shares	$ 0.01
Series A Preferred Stock shares outstanding \| shares	300,277		300,277
Credit Agreement \| Revolving Credit Facility
Basis of Presentation and Nature of Operations [Abstract]
Maximum borrowing capacity	$ 325.0					$ 325.0
Long-term debt	0.0		$ 0.0
Credit Agreement \| Canadian Revolving Credit Facility
Basis of Presentation and Nature of Operations [Abstract]
Maximum borrowing capacity					$ 175
Long-term debt	0.0		0.0
Credit Agreement \| 2025 Incremental Term Loans
Basis of Presentation and Nature of Operations [Abstract]
Long-term debt	$ 548.6		$ 550.0	$ 550.0