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Income Taxes - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Examination [Line Items] |  |  |
Deferred tax liabilities | $ 2.4 | $ 2.4 |
Accrued income taxes | 0.9 | 0.9 |
Unrecognized tax benefits | 17.6 | 17.6 | $ 29.1
Income tax penalties and interest expense |  | (6.9) | 3.2
Accrued interest and penalties | 5.0 | 5.0 | 15.7
Reduction for tax positions of prior years |  | (4.9) |
Decrease in liability for uncertain tax positions | (12.3) | (9.3) |
Deferred tax assets | 2.4 | 2.4 |
US State |  |  |
Income Tax Examination [Line Items] |  |  |
Operating loss carryforwards, valuation allowance | 54.9 | 54.9 |
US Federal |  |  |
Income Tax Examination [Line Items] |  |  |
Tax credit carryforward, valuation allowance | 10.6 | 10.6 |
Danish Tax Authority (SKAT) | Danish Tax Authority |  |  |
Income Tax Examination [Line Items] |  |  |
Tax deposit paid |  | 1.5 |
Danish Tax Authority (SKAT) | Tax Years After 2011 | Danish Tax Authority |  |  |
Income Tax Examination [Line Items] |  |  |
Deferred tax assets, net | $ 21.6 | $ 21.6 | $ 15.5

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- Definition Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due. This amount is the total of current and noncurrent accrued income taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(15)(1)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(15)(a)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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