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Contingent Liability Reserve Estimate, Policy [Policy Text Block] Entity Address, City or Town Entity Address, City or Town Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Lease liability Deferred Tax Assets, Lease Liability Deferred Tax Assets, Lease Liability 2025 Purchase Obligation, to be Paid, Year Two 2026 Purchase Obligation, to be Paid, Year Three Fair Values of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] License and royalty revenues License and Royalty Revenues [Member] License and Royalty Revenues [Member] Termination Date Trading Arrangement Termination Date Common stock, shares authorized (in shares) Common Stock, Shares Authorized Accrued Expenses and Other Liabilities and Other Long-Term Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Adjustments to reconcile net income (loss) to net cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Measurement Input Type [Axis] Measurement Input Type [Axis] Bridge Loan Bridge Loan [Member] Derivative [Line Items] Derivative [Line Items] Award Timing Disclosures [Line Items] Fair value of vested shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Disposal group holdback amount Disposal Group, Including Discontinued Operation, Consideration, Holdback Amount Disposal Group, Including Discontinued Operation, Consideration, Holdback Amount Income Taxes Income Tax, Policy [Policy Text Block] 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Three Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Insider Trading Arrangements [Line Items] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Options outstanding, aggregate intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Amortization of intangibles other than goodwill Deferred Tax Liabilities, Intangible Assets Other Than Goodwill Deferred Tax Liabilities, Intangible Assets Other Than Goodwill 2022 Term Facility 2022 Term Facility [Member] 2022 Term Facility Adjustments relating to prior period revenues SEC Schedule, 12-09, Valuation Allowances and Reserves, Increase (Decrease) Adjustment Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] Regulatory Milestones Regulatory Milestones [Member] Regulatory Milestones 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Two New York City New York City [Member] New York City Adjustment to Compensation, Amount Adjustment to Compensation Amount Cost of goods sold Cost of Sales [Member] Changes in fair value of contingent assets and liabilities Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Massachusetts MASSACHUSETTS Auditor Name Auditor Name Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of leases Number Of Operating Leases Number Of Operating Leases Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Less: accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Vesting of restricted stock awards Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Disposal Group Name [Axis] Disposal Group Name [Axis] Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Payments on long-term debt and other borrowings Repayments of Long-Term Debt Entity Central Index Key Entity Central Index Key Gain on interest rate swap termination Derivative, Gain (Loss) on Derivative, Net Changes in fair value included in net income (loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Total stock-based compensation expense Share-Based Payment Arrangement, Expense Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Cost Finite-Lived Intangible Assets, Gross Finished goods Inventory, Finished Goods, Net of Reserves Income Tax Authority [Domain] Income Tax Authority [Domain] Compensation and benefits Employee-related Liabilities, Current Revenue Benchmark Revenue Benchmark [Member] Name Trading Arrangement, Individual Name Total other comprehensive income (loss) Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Accretion expense Asset Retirement Obligation, Accretion Expense Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Revenues Total revenues Revenue from Contract with Customer, Excluding Assessed Tax Entity [Domain] Entity [Domain] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Legal Entity [Axis] Legal Entity [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Intangible assets Deferred Tax Assets, Goodwill and Intangible Assets Asset retirement obligations Balance at the beginning of the period Balance at the ending of the period Asset Retirement Obligations, Noncurrent Operating leases Operating Lease, Weighted Average Discount Rate, Percent Licenses Licensing Agreements [Member] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Business Combinations Business Combinations Policy [Policy Text Block] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Finance leases Finance Lease, Weighted Average Remaining Lease Term Finance lease, liability, noncurrent, statement of financial position [Extensible List] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Leasehold improvements Leasehold Improvements [Member] Sales and marketing Selling and Marketing Expense [Member] Diluted (in shares) Diluted weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Perspective Therapeutics, Inc Perspective Therapeutics, Inc [Member] Perspective Therapeutics, Inc Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Operating expenses Operating Expenses [Abstract] Payments to acquire license agreement Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Thereafter Finance Lease, Liability, to be Paid, after Year Five Business combination contingent value right of total consideration Business Combination, Contingent Liability, Contingent Value Right, Consideration Business Combination, Contingent Liability, Contingent Value Right, Consideration Tax indemnification expense, net Indemnification expense Tax Indemnification Agreement, Income (Expense) Represents the tax indemnification income (loss) earned during the period. Proceeds from convertible debt Proceeds from Convertible Debt Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition 2028 Long-Term Debt, Maturity, Year Five Operating cash flows from finance leases Finance Lease, Interest Payment on Liability Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Non-NEOs Non-NEOs [Member] Construction in progress Construction in Progress [Member] Financial Assets Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Non-PEO NEO Non-PEO NEO [Member] Adjustment to Compensation: Adjustment to Compensation [Axis] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Debt Instrument [Line Items] Debt Instrument [Line Items] Basic (in shares) Basic weighted-average common shares outstanding Weighted Average Number of Shares Outstanding, Basic Unamortized debt issuance costs Unamortized Debt Issuance Expense Depreciation Deferred Tax Liabilities, Property, Plant and Equipment Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Schedule of Indefinite-Lived Intangible Assets [Table] Schedule of Indefinite-Lived Intangible Assets [Table] 2.625% Convertible Senior Notes due 2027 Convertible Senior Notes 2.625 Percent Due 2027 [Member] Convertible Senior Notes 2.625 Percent Due 2027 Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Line of credit facility, unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Statement [Line Items] Statement [Line Items] Concentration Risk [Table] Concentration Risk [Table] Payment for acquisitions Payments For Asset Acquisitions Payments For Asset Acquisitions Interest accruals Unrecognized Tax Benefits, Interest on Income Taxes Accrued Intangible assets Deferred Tax Liabilities, Intangible Assets Liabilities Lease, Liability [Abstract] Lease, Liability [Abstract] Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis]