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v3.23.1

Income taxes - Reconciliation of federal tax rate to the effective rate (Details) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Income taxes |  |
U.S. statutory federal rate | 21.00% | 21.00%
State taxes, net of federal effect | 8.88% | 2.72%
Nontaxable foreign income | (25.57%) | (43.36%)
Research & Development Tax Credit | (1.92%) | (7.39%)
Permanent items | (0.70%) | (6.26%)
Goodwill impairment |  | 20.31%
Valuation allowance for deferred tax assets | 2.38% | 0.65%
Total U.S. statutory federal tax rate to the effective rate | 4.07% | (12.33%)

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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 Permanent items. + References No definition available. + Details
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