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Income taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income taxes
Change in valuation allowance	$ 3,428	$ 3,583
Interest Limitation Carryforwards	133
State and Local Jurisdiction
Income taxes
State net operating loss carryforward	22,416
Net operating losses, subject to expiration	20,218
Net operating losses, Not subject to expiration	2,198
Domestic Tax Authority
Income taxes
U.S. net operating loss carryforwards	16,771
Net operating losses, Not subject to expiration	$ 16,771

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Amount of operating loss carryforward not subject to expiration.

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Amount of state and local operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Amount of operating loss carryforward subject to expiration.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-12

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 740
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-Section 50
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