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Income Taxes - Operating loss and credit carryforwards (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2024
Federal
Operating loss carryforwards
Operating loss carryforwards expiration year	2030
Illinois
Operating loss carryforwards
Operating loss carryforwards expiration year	2031
Other state
Operating loss carryforwards
Operating loss carryforwards expiration year	2036

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-3

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