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Income taxes - Narrative (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Sep. 01, 2021 | May 03, 2021
Tax Credit Carryforward [Line Items] |  |  |  |  |
Stock-based compensation, tax benefits | $ 0 | $ 0 | $ 10,500,000 |  |
Operating loss carryforwards | 151,900,000 |  |  |  |
Deferred tax assets, operating loss carryforwards | 39,200,000 |  |  |  |
Deferred tax assets, operating loss carryforwards, not subject to expiration | 112,700,000 |  |  |  |
Capitalized research and development | $ 4,800,000 |  |  |  |
GCI Acquisition |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |
Deferred tax liability |  |  | 24,100,000 |  | $ 24,133,000
Income tax benefit |  |  | 8,000,000 |  |
Sexton Acquisition |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |
Deferred tax liability |  |  | $ 1,500,000 | $ 1,482,000 |

X
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- Definition Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
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- Definition 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. + References 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 + Details
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