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Income Taxes - Reconciliation of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] |  |  |
Tax at federal statutory rate | $ 7,562 | $ 15,163 | $ 272
State, net of federal benefit | 264 | (82) | (1,231)
Contingent liabilities | 15 | (7,993) | (266)
Share-based compensation | 1,279 | (12,080) | (623)
FDII | (2,395) | (637) | (1,652)
Research and development credits | 256 | (1,628) | (168)
Change in uncertain tax positions | (158) | 480 | (673)
Rate change for changes in federal, foreign or state law | (535) | (7,963) | (164)
Provision to return adjustments | 2,232 | (1,347) | (5,920)
Foreign tax differential on income/loss of foreign subsidiaries | 103 | (114) | (3,839)
Change in valuation allowance | 24,799 | 11,245 | (121,864)
Sale of Vernalis R&D | 0 | 0 | 127,372
Debt repurchases | 626 | 0 | 0
Subpart F income | 853 | 1,392 | 25
Officer compensation | 5,869 | 3,239 | 2,410
Other | 460 | (3,823) | 1,015
Total income tax expense (benefit) | $ 41,230 | $ (4,148) | $ (5,306)

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- Definition Amount of reported income tax benefit from difference to expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to foreign-derived intangible income (FDII). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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