Fair value of financial instruments - Assets and Liabilities at Fair Value (Details) - Fair Value, measurements, recurring - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair value of financial instruments
Total	$ 4,421	$ 4,105
Fair Value, Inputs, Level 1
Fair value of financial instruments
Total	4,421	4,105
Deferred compensation liability
Fair value of financial instruments
Total	4,421	4,105
Deferred compensation liability \| Fair Value, Inputs, Level 1
Fair value of financial instruments
Total	$ 4,421	$ 4,105

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-3

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