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Income taxes - Effective Income Tax Rate Reconciliation (Details) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Abstract] |  |  |
Federal statutory tax | 21.00% | 21.00% | 21.00%
State tax, net of federal benefit | 4.00% | 3.00% | 7.00%
Stock compensation | (2.00%) | 0.00% | 36.00%
Sec. 162(m) limitation on executive compensation | (2.00%) | (1.00%) | (11.00%)
Fair value change in contingent consideration | 1.00% | 1.00% | (2.00%)
Transaction costs | 0.00% | 0.00% | (1.00%)
Gain on stock acquisition | 0.00% | 0.00% | 5.00%
Tax credits | 1.00% | 1.00% | 0.00%
Change in valuation allowance | (25.00%) | (21.00%) | 20.00%
Expired net operating losses | 0.00% | 0.00% | (5.00%)
Gain on escrow settlement | 0.02 | 0 | 0
Other | 0.00% | 0.00% | (1.00%)
Total | 0.00% | 4.00% | 69.00%

X
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- Definition Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to 162(m) limitation on executive compensation deductibility. + References No definition available. + Details
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- Definition Percentage 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 changes 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 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479360/740-10-S99-1 + Details
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