75000 - Document - Document And Entity Information
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75010 - Statement - Consolidated Balance Sheets
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75020 - Statement - Consolidated Balance Sheets (Parentheticals)
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75030 - Statement - Consolidated Statements of Operations and Comprehensive Loss
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75040 - Statement - Consolidated Statements of Operations and Comprehensive Loss 2
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75050 - Statement - Consolidated Statements of Cash Flows
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75060 - Statement - Consolidated Statements of Changes in Stockholders' Equity
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75070 - Statement - Consolidated Statements of Changes in Stockholders' Equity (Parentheticals)
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995457 - Disclosure - Cybersecurity
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995467 - Disclosure - Note 1 - Description of Business
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995477 - Disclosure - Note 2 - Summary of Significant Accounting Policies
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995487 - Disclosure - Note 3 - Investments and Agreements
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995497 - Disclosure - Note 4 - Merger
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995507 - Disclosure - Note 5 - Discontinued Operations
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995517 - Disclosure - Note 6 - Prepaid Expenses and Other Current Assets
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995527 - Disclosure - Note 7 - Property and Equipment
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995537 - Disclosure - Note 8 - Available-for-Sale Securities
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995547 - Disclosure - Note 9 - Fair Value Measurements
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995557 - Disclosure - Note 10 - Restricted Cash
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995567 - Disclosure - Note 10 - Intangible Assets and Other Assets, Net
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995577 - Disclosure - Note 11 - Leases
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995587 - Disclosure - Note 12 - Notes Payable
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995597 - Disclosure - Note 13 - Share-Based Compensation
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995607 - Disclosure - Note 13 - Stockholders' Equity
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995617 - Disclosure - Note 14 - Income Taxes
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995627 - Disclosure - Note 16 - 401(k) Plan
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995637 - Disclosure - Note 17 - Commitments and Contingencies
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995647 - Disclosure - Note 18 - Concentrations of Credit and Other Risks
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995657 - Disclosure - Note 19 - Related Parties
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995667 - Disclosure - Note 22 - Subsequent Events
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995677 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Policies)
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995687 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Tables)
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995697 - Disclosure - Note 3 - Loss Per Share (Tables)
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995707 - Disclosure - Note 4 - Merger (Tables)
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995717 - Disclosure - Note 5 - Discontinued Operations (Tables)
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995727 - Disclosure - Note 6 - Prepaid Expenses and Other Current Assets (Tables)
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995737 - Disclosure - Note 7 - Property and Equipment (Tables)
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995747 - Disclosure - Note 8 - Available-for-Sale Securities (Tables)
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995757 - Disclosure - Note 9 - Fair Value Measurements (Tables)
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995767 - Disclosure - Note 10 - Intangible Assets and Other Assets, Net (Tables)
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995777 - Disclosure - Note 11 - Leases (Tables)
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995787 - Disclosure - Note 12 - Notes Payable (Tables)
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995797 - Disclosure - Note 13 - Share-Based Compensation (Tables)
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995807 - Disclosure - Note 13 - Stockholders' Equity (Tables)
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995817 - Disclosure - Note 14 - Income Taxes (Tables)
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995827 - Disclosure - Note 1 - Description of Business (Details Textual)
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995837 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Estimated Useful Lives (Details)
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995847 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Schedule of Securities Not Considered in Calculation of Diluted Weighted Average Shares (Details)
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995857 - Disclosure - Note 3 - Loss Per Share - Schedule of Securities Not Considered in Calculation of Diluted Weighted Average Shares (Details)
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995867 - Disclosure - Note 3 - Loss Per Share (Details Textual)
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995877 - Disclosure - Note 3 - Investments and Agreements (Details Textual)
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995887 - Disclosure - Note 4 - Merger (Details Textual)
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995897 - Disclosure - Note 4 - Merger - Summary of Estimated Purchase Consideration (Details)
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995907 - Disclosure - Note 4 - Merger - Summary of Estimated Purchase Consideration (Details) (Parentheticals)
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995917 - Disclosure - Note 4 - Merger - Summary of Preliminary Purchase Price Allocation (Details)
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995927 - Disclosure - Note 4 - Merger - Summary of Pro Forma Computation of Earnings Per Share (Details)
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995937 - Disclosure - Note 5 - Discontinued Operations (Details Textual)
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995947 - Disclosure - Note 5 - Discontinued Operations - Schedule of Discontinued Operations (Details)
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995957 - Disclosure - Note 6 - Prepaid Expenses and Other Current Assets - Prepaid Expenses and Other Current Assets (Details)
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995967 - Disclosure - Note 7 - Property and Equipment (Details Textual)
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995977 - Disclosure - Note 7 - Property and Equipment - Summary of Property and Equipment (Details)
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995987 - Disclosure - Note 8 - Available-for-Sale Securities - Summary of Cash Equivalents (Details)
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995997 - Disclosure - Note 8 - Available-for-sale Securities - Summary of Company's Available-for-sale Securities Measured at Fair Value on Recurring Basis (Details)
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996007 - Disclosure - Note 8 - Available-for-Sale Securities (Details Textual)
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996017 - Disclosure - Note 9 - Fair Value Measurements - Summary of Cash Equivalents and Short-term Investments Measured at Fair Value on Recurring Basis (Details)
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996027 - Disclosure - Note 9 - Fair Value Measurements (Details Textual)
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996037 - Disclosure - Note 10 - Restricted Cash (Details Textual)
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996047 - Disclosure - Note 10 - Intangible Assets and Other Assets, Net (Details Textual)
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996057 - Disclosure - Note 10 - Intangible Assets and Other Assets, Net - Summary of Components of Indefinite-lived Intangible Assets (Details)
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996067 - Disclosure - Note 10 - Intangible Assets and Other Assets, Net - Intangible Assets Net of Accumulated Amortization (Details)
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996077 - Disclosure - Note 10 - Intangible Assets and Other Assets, Net - Amortization Expense (Details)
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996087 - Disclosure - Note 10 - Intangible Assets and Other Assets, Net - Future Amortization Expense (Details)
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996097 - Disclosure - Note 11 - Leases (Details Textual)
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996107 - Disclosure - Note 11 - Leases - Summary of Future Operating Lease Payments and Lease Liability (Details)
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996117 - Disclosure - Note 11 - Leases - Summary of Future Operating Lease Payments and Lease Liability (Details) 2
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996127 - Disclosure - Note 12 - Notes Payable (Details Textual)
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996137 - Disclosure - Note 12 - Notes Payable - Summary of Note Payable (Details)
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996147 - Disclosure - Note 12 - Notes Payable - Summary of Maturity of Note Payable (Details)
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996157 - Disclosure - Note 13 - Share-Based Compensation - Summary of Share-based Compensation Expense Recognized for Share-based Compensation Arrangements Excluding Share-based Compensation Expense (Details)
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996167 - Disclosure - Note 13 - Share-Based Compensation (Details Textual)
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996177 - Disclosure - Note 13 - Share-Based Compensation - Summary of Weighted Average Fair Value of Stock Option Awards Granted and Key Assumptions (Details)
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996187 - Disclosure - Note 13 - Share-Based Compensation - Summary of Stock Option Activity (Details)
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996197 - Disclosure - Note 13 - Stockholders' Equity (Details Textual)
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996207 - Disclosure - Note 13 - Stockholders' Equity - Warrant Activity (Details)
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996217 - Disclosure - Note 14 - Income Taxes (Details Textual)
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996227 - Disclosure - Note 14 - Income Taxes - Summary of Components of Loss Before Income Taxes by U.S. and Foreign Jurisdictions (Details)
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996237 - Disclosure - Note 14 - Income Taxes - Schedule of Expense (Benefit) for Income Taxes (Details)
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996247 - Disclosure - Note 14 - Income Taxes - Reconciliation of Effective Rate (Details)
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996257 - Disclosure - Note 14 - Income Taxes - Reconciliation of Effective Rate (Details) (Parentheticals)
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996267 - Disclosure - Note 14 - Income Taxes - Summary of Income Taxes Paid (Net of Refunds Received) (Details)
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996277 - Disclosure - Note 14 - Income Taxes - Components of Deferred Tax Assets and Liabilities (Details)
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996287 - Disclosure - Note 14 - Income Taxes - Summary of Reconciliation of the Beginning and Ending Balance of Total Unrecognized Tax Benefits (Details)
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996297 - Disclosure - Note 16 - 401(k) Plan (Additional Information) (Details)
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996307 - Disclosure - Note 17 - Commitments and Contingencies (Details Textual)
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996317 - Disclosure - Note 18 - Concentrations of Credit and Other Risks (Details Textual)
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996327 - Disclosure - Note 19 - Related Parties (Detailed Textual)
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Proceeds from the sale of property and equipment
Proceeds from Sale of Property, Plant, and Equipment
Proceeds from Sale of Property, Plant, and Equipment, Total
Retirement Plan Type [Axis]
Income (Loss) from Continuing Operations before Income Taxes, Foreign
Foreign
Foreign
Right-of-use asset
amount of right of use assets acquired at acquisition date.
catx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAssets
Payments to purchase buildings
Note receivable, forgiven amount
us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Shares and warrants, price difference per share
Shares And Warrants Price Difference
Represents the difference between shares and warrants prices.
Entity Incorporation, State or Country Code
Preferred stock, shares issued
Preferred stock, shares issued (in shares)
Statement of Financial Position Location, Balance [Domain]
Income Tax Rate Reconciliation, Changes in unrecognized tax benefits
Income tax rate reconciliation, changes in unrecognized tax benefits.
Changes in unrecognized tax benefits
Capitalized Computer Software, Gross
Website development
Inventory
Disposal Group, Including Discontinued Operation, Inventory, Current
Revision of Prior Period [Axis]
Supplemental schedule of noncash investing and financing activities:
Royalty agreement percentage of net sales receivable
Royalty Agreement Percentage Of Net Sales Receivable
Represents the percentage of net sales receivable as part of a royalty agreement.
US Government Agencies Securities, at Carrying Value
Securities of U.S. government and government agencies
Plan Name [Axis]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer
Available-for-sale securities that were in a gross unrealized loss position for 12 months or more, fair value
Equity [Abstract]
Entity Current Reporting Status
Equity [Line Items]
Equity.
Class of Financing Receivable [Axis]
Proceeds from Warrant Exercises
Proceeds from sales of common stock, pursuant to exercise of warrants, net
US Government Agencies Debt Securities [Member]
Securities of U.S. Government and Government Agencies [Member]
Viewpoint Molecular Targeting, Inc. [Member]
Represents Viewpoint Molecular Targeting, Inc.
Viewpoint Molecular Targeting, Inc. [Member]
Operating expenses:
Level 2 [Member]
Fair Value, Inputs, Level 2 [Member]
Deferred Tax Assets, Net of Valuation Allowance
Net deferred tax assets
Corporate debt securities
Corporate Debt Securities At Carrying Value
Corporate debt securities at carrying value.
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Deferred Income, net of current portion (Note 3)
Deferred Income, Noncurrent
Common stock, shares authorized
Common stock, authorized (in shares)
Deferred Tax Assets, Capital Loss Carryforwards
Capital loss carryforwards
Asset Retirement Obligation [Policy Text Block]
Asset Retirement Obligation
Income Tax Uncertainties [Abstract]
Product and Service [Axis]
Document Fiscal Period Focus
Debt instrument, interest rate
us-gaap_DebtInstrumentInterestRateStatedPercentage
Entity Shell Company
Cash dividends
Dividends, Common Stock, Cash
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Cash and cash equivalents
Total purchase price consideration
Summary of Maturity of Note Payable
Schedule of Maturities of Long-Term Debt [Table Text Block]
Note payable
Notes Payable, Current, Total
Notes payable, current
us-gaap_NotesPayableCurrent
Less: current portion
Cybersecurity Risk Management, Strategy, and Governance [Abstract]
Common stock, shares issued
Common stock, issued (in shares)
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]
Cybersecurity Risk Board of Directors Oversight [Text Block]
Statement [Table]
Option Agreement [Member]
Option Agreement [Member]
Represents the option agreement.
Lantheus Alpha Therapy, LLC [Member]
Lantheus Alpha Therapy, LLC.
Increases related to current year tax positions
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Modification of operating lease liability and right of use asset
Modification of operating lease liability and right-of-use asset
us-gaap_InterestReceivable
Accrued interest receivable
Interest receivable
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Weighted average fair value
Statement [Line Items]
Business Combination [Domain]
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price
Weighted Average Exercise Price per Share, Expired
Common Stock Warrants [Member]
Warrant [Member]
Entity Filer Category
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and stockholders' equity
Vehicles [Member]
Debt Instrument [Line Items]
Increase (Decrease) in Employee Related Liabilities, Total
Increase (Decrease) in Employee Related Liabilities
Accrued personnel expenses
Amortization
Amortization, Total
Amortization of other assets
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Weighted Average Exercise Price per Share, Exercisable
Long-Lived Tangible Asset [Axis]
2026 Offering [Member]
2026OfferingMember.
Business acquisition, percentage of voting interests acquired
us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]
Finite-Lived Intangible Assets, Remaining Amortization Period
Intangible assets, forecast period
Deferred Tax Assets, Valuation Allowance
Valuation allowance at beginning of the period
Valuation allowance
Valuation allowance at end of the period
us-gaap_TableTextBlock
Notes Tables
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Income tax at U.S. statutory rate, Percent
Stock purchase price per share
Shares Issued, Price Per Share
Cybersecurity Risk Management Third Party Engaged [Flag]
Documents Incorporated by Reference [Text Block]
Goodwill
Balance
Balance
Goodwill
Goodwill, Total
Other Noncash Income (Expense)
Other Noncash Income (Expense), Total
Other, net
Effective income tax rate
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Effective income tax rate
Common Stock Options [Member]
Interest income
Income Tax Jurisdiction [Axis]
Geographical [Domain]
Number of plaintiff
Loss Contingency, Number of Plaintiffs
Asset-backed Securities [Member]
Asset-Backed Securities [Member]
Amount of accrued payroll and related taxes, assumed at the acquisition date.
catx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedPayrollAndRelatedTax
Accrued payroll and related taxes
Other Current Assets [Text Block]
Prepaid Expenses and Other Current Assets
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Noncurrent assets:
Assets, Noncurrent [Abstract]
Related to other property plant and equipment not specifically disclosed.
Other [Member]
Other [Member]
Warrants Exercisable on or Before January 11, 2024 [Member]
Warrants Exercisable On Or Before January 11 2024 Member
Warrants exercisable on or before January 11 2024.
Isoray Note [Member]
Relating to the Isoray note.
Allowance for doubtful accounts
Accounts Receivable, Allowance for Credit Loss
Accounts Receivable, Allowance for Credit Loss, Ending Balance
Accounts Receivable, Allowance for Credit Loss, Beginning Balance
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation
Lease liability
Additional paid-in capital
Additional paid-in capital
Proceeds from Sale and Maturity of Held-to-Maturity Securities
Proceeds from Sale and Maturity of Held-to-Maturity Securities, Total
Proceeds from maturity of held-to-maturity investments
Net Sales Between $10.0 and 15.0 Million [Member]
Net Sales Between 10 And 15 Million [Member]
Relating to net sales between $10 and 15 million.
Two Thousand Twenty Six Pre-funded Warrants [Member]
2026 Pre-funded Warrants.
2026 Pre-funded Warrants [Member]
Significant Accounting Policies [Text Block]
Summary of Significant Accounting Policies
Property, Plant and Equipment [Line Items]
Schedule of Cash and Cash Equivalents [Table Text Block]
Summary of Company's Cash Equivalents
Stock option awards granted
Granted, Options (in shares)
Number of Stock Options Outstanding, Granted
Property and equipment, net
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current
Equity Securities [Member]
Concentration Risk Disclosure [Text Block]
Concentrations of Credit and Other Risks
Investment, Name [Axis]
Basic loss per share
Basic and diluted loss per share (in dollars per share)
Basic loss per share
Retirement Benefits [Text Block]
401(k) Plan
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number
Beginning Balance, Stock Options
Ending Balance, Stock Options
us-gaap_GainLossOnDispositionOfAssets
Loss on disposal of property and equipment
Loss on disposal of property and equipment
Loss (gain) on disposal of property and equipment
Loss (gain) on disposal of property and equipment
Chino California [Member]
Chino California [Member]
Chino california.
Retirement Plan Type [Domain]
us-gaap_LiabilitiesCurrent
Total current liabilities
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable
Foreign currency adjustments
Adjustments to reconcile net loss to net cash used in operating activities:
Lessee, Operating Lease, Liability, to be Paid, Year Five
2029
Finite Lived Intangible Asset, Amortization Expense, after Year Three
Finite lived intangible asset, amortization expense, after year three.
Thereafter
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price
Exercise price
Progenics APA [Member]
Progenics APA.
U.S. federal
Income Tax Paid, Federal, after Refund Received
Income Tax Paid, Federal, after Refund Received, Total
Domestic Tax Jurisdiction [Member]
Domestic Tax Authority [Member]
Maturities of available-for-sale securities
Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale
Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale, Total
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
Increases related to prior year tax positions
GT Medical Stock [Member]
G T Medical Stock [Member]
Relating to GT Medical stock.
GT Medical Technologies, Inc. [Member]
Refers to information regarding the entity GT Medical Technologies, Inc.
GT Medical Technologies, Inc. [Member]
Repayment provisions
Repayment Provisions
Repayment provisions.
Stockholders' equity:
Stockholders' equity:
Entity Small Business
Note 8 - Share-based Compensation
Accumulated deficit
Accumulated deficit
Total accumulated deficit
Accumulated deficit
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost
Share-based compensation
Net Accretion of Discounts on Available-for-sale Securities
Net accretion of discounts on available-for-sale securities.
Net accretion of discounts on available-for-sale securities
Debt Securities, Held-to-Maturity, Allowance for Credit Loss
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Ending Balance
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Beginning Balance
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Total
Allowance for credit loss
Entity Well-known Seasoned Issuer
Stock option awards forfeited
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Number of Stock Options Outstanding, Forfeited
Sale of stock, price per share
Sale of Stock, Price Per Share
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Aggregate intrinsic value of options exercised
Total intrinsic value of options exercised
Current Foreign Tax Expense (Benefit)
Foreign
Series B Convertible Preferred Stock [Member]
Series B convertible preferred stock.
Class Of Warrant Or Right Weighted Average Exercise Price Of Warrants Or Rights Exercised
Class of warrant or right weighted average exercise price of warrants or rights exercised.
Warrants exercised (in dollars per share)
Share-Based Compensation
Share-Based Payment Arrangement [Text Block]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Aggregate maximum estimate settlement amount
Aggregate maximum estimate settlement amount.
Stock Issued During Period Value Prefunded Warrants Exercised
Stock issued during period value prefunded warrants exercised.
Issuance of common stock pursuant to the exercise of Pre-funded Warrants, net
Lease Contractual Term [Axis]
Leases [Abstract]
Lessee, Lease, Description [Line Items]
Amendment Flag
Maturities of Long-Term Debt [Abstract]
Estimate aggregate cost of building modifications
Estimate aggregate cost of building modifications.
Product and Service [Domain]
Loss Contingencies [Line Items]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
Income tax at U.S. statutory rate
Schedule of Held-to-Maturity Securities [Line Items]
Warrants to purchase shares of common stock
us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Earnings Per Share, Policy [Policy Text Block]
Loss per Share
Current assets held for sale, discontinued operations
Total current assets held for sale of discontinued operations
Disposal Group, Including Discontinued Operation, Assets, Current
LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities and Equity [Abstract]
Entity Address, Postal Zip Code
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash used in operating activities
Other assets, net
Disposal Group, Including Discontinued Operation, Other Assets, Current
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description
Two Thousand Seventeen Incentive Plan [Member]
Two thousand seventeen incentive plan.
2017 Incentive Plan [Member]
Common Stock [Member]
Common Stock [Member]
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]
Cybersecurity Risk Role of Management [Text Block]
Tax Credit Carryforward, Amount
Tax Credit Carryforward, Amount
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
2026
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Weighted Average Exercise Price per Share, Granted
2027
2028
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Less accumulated depreciation
Debt Securities, Available-for-Sale [Line Items]
2024 At-the-Market (ATM) Agreement [Member]
Two Thousand Twenty Four At Market Offering [Member]
Two Thousand Twenty Four At Market Offering Member.
Represents promissory note.
Promissory Note [Member]
ROFO Option [Member]
ROFO Option.
Portion at Fair Value Measurement [Member] [Default]
Portion at Fair Value Measurement [Member]
Entity Address, Address Line One
Deferred Tax Liabilities, Gross
Deferred Tax Liabilities, Gross, Total
Total deferred tax liabilities
Summary of Weighted Average Fair Value of Stock Option Awards Granted and Key Assumptions
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Fair Value Hierarchy and NAV [Axis]
Class Of Warrant Or Right Recalculation of Warrants Outstanding After Reverse Split
Class Of Warrant Or Right Recalculation of Warrants Outstanding After Reverse Split.
Adjustment based on recalculation of warrants outstanding after Reverse Split (Note 1) (in shares)
Basic and diluted loss per share:
Earnings Per Share [Abstract]
Income Tax, Policy [Policy Text Block]
Income Taxes
Estimated liability
us-gaap_LossContingencyAccrualAtCarryingValue
Loss Contingency Accrual
Statement of Financial Position Location, Balance [Axis]
Investment Type [Axis]
Fair Value Measurements, Nonrecurring [Table Text Block]
Summary of Cash Equivalents and Short-term Investments Measured at Fair Value on Recurring Basis
Right-of-use asset, net
Right of use asset
Right of use asset, net
Available-for-sale securities, fair value
Debt Securities, Available-for-Sale, Unrealized Loss Position
Debt Securities, Available-for-Sale, Unrealized Loss Position, Total
Deferred Tax Assets, Gross
Total deferred tax assets
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]
Effective Income Tax Rate Reconciliation, State and Local Jurisdiction, Contribution Greater than 50 Percent, Tax Effect [Extensible Enumeration]
Payments to Acquire Debt Securities, Available-for-Sale
Purchases of available-for-sale securities
Sales, net
Disposal Group, Including Discontinued Operation, Revenue
Progenics [Member]
Progenics.
Assumption fair value of stock options and warrants in acquiring a business or in consideration for an asset received in a noncash or part noncash acquisition.
Assumption of Viewpoint stock options and warrants at fair value
Class of Warrant or Right [Axis]
Document Type
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block]
Summary of Changes in Stock Options Outstanding
Summary of Stock Option Activity
Goodwill and Intangible Assets, Policy [Policy Text Block]
In-Process Research and Development (IPR&D)
Income taxes paid (net of refunds received)
Income Taxes Paid, Net
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Entity Central Index Key
Coralville, IA [Member]
Coralville, IA.
Summary of Company's of Available-for-sale Securities Measured at Fair Value on Recurring Basis
Debt Securities, Available-for-Sale [Table Text Block]
Investments, Debt and Equity Securities [Abstract]
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]
Note 3 - Loss Per Share - Antidilutive Securities (Details)
Public Offering [Member]
Public Offering [Member]
Public offering.
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net (decrease) increase in cash and cash equivalents
Subsequent Event Type [Domain]
Total potential dilutive securities
Antidilutive securities (in shares)
Note 11 - Leases
Expiring Between 2033 And 2043 [Member]
Expiring Between 2033 And 2043.
Expiring Between 2033 and 2043 [Member]
Disposal Group Classification [Domain]
Percentage of issued and outstanding capital stock
Percentage Of Issued And Outstanding Capital Stock
Percentage of issued and outstanding capital stock.
Business Combination, Consideration Transferred, Equity Interest, Type [Domain]
Common stock, par value
Common Stock, Par or Stated Value Per Share (in dollars per share)
Common stock, par value (in dollars per share)
Money Market Funds, at Carrying Value
Money market fund
Security Deposit
Security deposits
Stock Option Vesting Period
Stock option vesting period.
Stock option vesting period
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term (years)
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum
Expected volatility, maximum
Available-for-Sale Securities, Amortized Cost
Debt Securities, Available-for-Sale, Amortized Cost
Debt Securities, Available-for-Sale, Amortized Cost, Total
Short-term investments, amortized cost
Debt Securities, Available-for-Sale
Available-for-sale securities, fair value
Available-for-Sale Securities, Estimated Fair Value
Loss before income tax:
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]
Class Of Warrant Or Right Weighted Average Exercise Price
Class of warrant or right weighted average exercise price.
Balance (in dollars per share)
Balance (in dollars per share)
Document Financial Statement Error Correction [Flag]
Options exercised
Issuance of common stock pursuant to exercise options (in shares)
Number of Stock Options Outstanding, Exercised
Number of Stock Options Outstanding, Exercised
Other Prepaid Expense, Current
Other prepaid expenses
Percentage of increase in common stock capital shares for future issuance.
Percentage Of Increase In Common Stock Capital Shares For Future Issuance
Percentage of increase in common stock capital shares for future issuance
Debt Disclosure [Abstract]
Fair Value Measurements
Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block]
Estimate of Fair Value Measurement [Member]
Estimated Fair Value [Member]
Forgiven of notes receivable and accrued interest assumed in acquiring a business or in consideration for an asset received in a noncash or part noncash acquisition.
Note receivable and accrued interest from Viewpoint forgiven
Represents the Underwriting Agreement.
The Underwriting Agreement [Member]
Underwriting Agreement [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Increase (DeIncrease (decrease) in inventory related to discontinued operations.crease) In Inventory Related to Discontinued Operations
Increase (Decrease) In Inventory Related to Discontinued Operations
Inventory related to discontinued operations (Note 4)
Current Fiscal Year End Date
Schedule of Long-Term Debt Instruments [Table]
Loss recognized on classification as held for sale
Disposal Group Including Discontinued Operation Loss On Classification Current
Amount classified as loss of classification attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.
Number of affiliated predecessor companies acquired
Business Combination, Number of Businesses Acquired
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
Other assets
Lease liability
Disposal Group Including Discontinued Operation Lease Liabilities Current
Amount classified as lease liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.
Litigation Case [Domain]
Entity Address, State or Province
Agent commission fee as a percentage of gross sales price
Sale Of Stock Maximum Commission Percentage
Sale of stock maximum commission percentage.
Investment, Name [Domain]
Summary of Estimated Purchase Consideration
Business Combination [Table Text Block]
Preferred stock, shares outstanding
Preferred stock, shares outstanding (in shares)
Preferred Stock, Shares Outstanding, Ending Balance
Preferred Stock, Shares Outstanding, Beginning Balance
Comprehensive loss
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Research and Development Expense, Policy [Policy Text Block]
Research and Development Costs
Discontinued Operations
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Class of Warrant or Right [Domain]
Geographical [Axis]
Increase (Decrease) in Accrued Interest Receivable, Net
Interest receivable
IncreaseDecreaseInAccruedInterestReceivableNet
Accrued interest receivable
Discontinued Operations, Policy [Policy Text Block]
Significant Accounting Policies Related to Discontinued Operations
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
State income taxes, net of federal benefit
Summary of Share-based Compensation Expense Recognized for Share-based Compensation Arrangements Excluding Share-based Compensation Expense
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount
Other
Issuance of common stock pursuant to exercise of options
Stock Issued During Period, Value, Stock Options Exercised
Comprehensive Income, Policy [Policy Text Block]
Comprehensive Loss
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Components of Deferred Tax Assets and Liabilities
Loss from continuing operations, Basic
Income (Loss) from Continuing Operations, Per Basic Share
Subsequent Event [Member]
Subsequent Event [Member]
Equity Method Investment, Nonconsolidated Investee [Domain]
Property, Plant and Equipment [Abstract]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares)
Other assets, net
Other assets, net
Measurement Input, Expected Term [Member]
Debt Securities, Available-for-Sale, Current
Available-for-sale securities
Proceeds from issuance of common stock pursuant to At-the-Market, net
Proceeds from the issuance of common stock pursuant to the ATM, net.
Proceeds from the issuance of common stock pursuant to the ATM, net
Antidilutive Securities [Axis]
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets
Prepaid expenses
Stock option awards expired
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod
Number of Stock Options Outstanding, Expired
Income Tax Paid, Foreign, after Refund Received
Income Tax Paid, Foreign, after Refund Received, Total
Foreign
Interest expense
us-gaap_InterestExpenseDebt
State and Local Jurisdiction [Member]
State and Local Jurisdiction [Member]
Internal Rate of Return [Member]
Internal rate of return.
Available-for-Sale Securities [Member]
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Goodwill impairment
Goodwill impairment
Options to purchase shares of common stock
Gross number of share options (or share units) assumed during the period.
Options assumed, Options (in shares)
Number of Stock Options Outstanding, Options assumed
A T M agreement.
A T M Agreement [Member]
A T M Agreement [Member]
Debt Securities, Held-to-Maturity [Table]
us-gaap_BusinessCombinationConsiderationTransferred1
Total fair value of consideration transferred
Preferred stock, $.001 par value; 7,000,000 shares authorized: Series B: 5,000,000 shares allocated; no shares issued and outstanding
Preferred stock: $0.001 par value; 7,000,000 shares authorized; 5,000,000 designated Series B convertible; no shares issued
Property and equipment in accounts payable and accrued expenses
Property and equipment in accounts payable and accrued expenses.
Property and equipment in accounts payable and accrued expenses
Intangible assets, in-process research and development
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Schedule of Discontinued Operations
Disposal Groups, Including Discontinued Operations [Table Text Block]
Represents promissory note for purchasing land and building.
Promissory Note for Purchasing Land and Building [Member]
Consideration for equipment and services pursuant to the MESA and SOWs
Asset Acquisition, Consideration Transferred, Contingent Consideration
Minimum [Member]
Minimum [Member]
Financial Instrument [Axis]
Current assets:
Current assets:
Gain (Loss) on Sale of Assets and Asset Impairment Charges
(Gain) loss recognized on assets held for sale
Royalties payable
(Gain) loss recognized on assets held for sale
Amortization of Intangible Assets
Total amortization expense
Level 3 [Member]
Fair Value, Inputs, Level 3 [Member]
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
Total assets acquired
Deferred Tax Liabilities, Property, Plant and Equipment
Property and equipment
Business Combination [Policy Text Block]
Business Acquisition Accounting
Tax Period [Domain]
Amount of increase in additional paid in capital (APIC) resulting from the assumption of stock options and warrants at fair value.
catx_AdjustmentsToAdditionalPaidInCapitalAssumptionOfStockOptionsAndWarrantsAtFairValue
Assumption of Viewpoint stock options and warrants at fair value
Current liabilities:
Current liabilities:
Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables and accrued expenses, assumed at the acquisition date.
catx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndAccruedExpenses
Accounts payable and accrued expenses
Related Party Transactions [Abstract]
Business Combination, Consideration Transferred, Equity Interest, Type [Axis]
Investments and Agreements
Investments And Agreements Disclosure [Text Block]
Investments and agreements disclosure.
us-gaap_SharesOutstanding
Balances (in shares)
Balances (in shares)
Operating Loss Carryforwards
Accounts receivable, net
Accounts receivable, net of allowance for doubtful accounts: $375 and $543
Tax Credit Carryforward [Table]
Income Tax Paid, by Individual Jurisdiction [Abstract]
Restricted Cash and Cash Equivalent
Restricted Cash and Cash Equivalents, Total
Commitments and contingencies (Note 9)
Commitments and contingencies (Note 16)
Lessee, Leases [Policy Text Block]
Leases
General and Administrative Expenses [Member]
General and Administrative Expense [Member]
General and Administrative [Member]
Indefinite-Lived Intangible Assets [Line Items]
Total lease liability, Total
Lease liability
Total lease liability
Auditor Firm ID
Deferred Income (Note 3)
Deferred Income, Current
Stockholders' Equity, Reverse Stock Split
Reverse stock split
U.S. Treasury Bills [Member]
US Treasury Bill Securities [Member]
The Los Angeles CA [Member]
Los Angeles CA.
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
2027
March 2024 Investment Agreement [Member]
March Two Thousand Twenty Four Investment Agreement [Member]
March two thousand twenty four investment agreement.
Lessee, Lease, Description [Table]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent
Change in valuation allowance, Percent
Payments to Acquire Equity Method Investments
Lease Contractual Term [Domain]
Current liabilities of discontinued operations
Total current liabilities of discontinued operations
Disposal Group, Including Discontinued Operation, Liabilities, Current
Tax Credit Carryforward [Line Items]
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Cash and cash equivalents
Total operating expenses
Total operating expenses
Disposal Group, Including Discontinued Operation, Operating Expense
Class Of Warrant Or Right Weighted Average Exercise Price Of Warrants Or Rights Assumed
Class of warrant or right weighted average exercise price of warrants or rights assumed.
Warrants assumed with the acquisition of Viewpoint (Note 4) (in dollars per share)
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]
Loss Contingencies [Table]
Basic
Basic and diluted (in shares)
Scenario [Axis]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value
Aggregate Intrinsic Value, Exercisable
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount
Other
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Reconciliation of Effective Rate
Right of use asset
Deferred Tax Liabilities, Leasing Arrangements
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax
Net loss from discontinued operations
Net gain (loss) from discontinued operations
Long-Lived Tangible Asset [Domain]
Expiring Between 2024 And 2037 [Member]
Expiring Between 2024 And 2037 [Member]
Expiring Between 2024 and 2037 [Member]
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]
Subsequent Events [Text Block]
Subsequent Events
BofA Securities, Inc.
Bof A Securities, Inc [Member]
BofA Securities, Inc [Member]
Total
us-gaap_LongTermDebt
Related Party Transactions Disclosure [Text Block]
Related Parties
Share-based compensation
Share-based compensation
Change in valuation allowance
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount
us-gaap_StockholdersEquity
Balances
Balances
Total stockholders' equity
Preferred stock, par value
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share (in dollars per share)
Pre Funded Warrants Not Issued And Expired As Part Of Cashless Exercise
Pre-funded warrants not issued and expired as part of cashless exercise.
Pre-funded warrants not issued and expired as part of cashless exercise
Statement of Stockholders' Equity [Abstract]
Series C Preferred Stock [Member]
Percentage of fully-diluted outstanding capital stock
Represents number of shares issued as a percentage of fully diluted outstanding capital stock.
catx_SharesIssuedPercentOfFullydilutedOutstandingCapitalStock
Equity method investment
Equity Method Investments
Series A Preferred Stock [Member]
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Equity Method Investment [Table]
Credit Loss, Financial Instrument [Policy Text Block]
Allowance for Credit Losses
Property and equipment
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Defined Benefit Plan Disclosure [Line Items]
Over-Allotment Option [Member]
Over-Allotment Option [Member]
Leasehold improvements
Leasehold Improvements [Member]
Gain (Loss), Foreign Currency Transaction, before Tax
Gain (Loss), Foreign Currency Transaction, before Tax, Total
Foreign currency adjustments
Foreign currency adjustments
Schedule of Estimated Useful Lives Of Assets [Table Text Block]
Schedule of estimated useful lives of assets table text block.
Estimated Useful Lives
us-gaap_PaymentsToAcquireHeldToMaturitySecurities
Purchases of held-to-maturity investments
Program License Option [Member]
Program license option.
Prepaid research and development expenses
Prepaid research and development expenses
Prepaid research and development expenses
Debt Securities, Available-for-Sale, Accrued Interest Writeoff
Available-for sale securities, accrued interest writeoff
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Debt Instrument, Name [Domain]
Other Assets, Current
Other current assets
Measurement Input, Discount Rate [Member]
Loss on equity method investment
Equity in loss of affiliate
Income (Loss) from Equity Method Investments
Equity in loss of affiliate
Summary of Reconciliation of the Beginning and Ending Balance of Total Unrecognized Tax Benefits
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Debt instrument, periodic payment
us-gaap_DebtInstrumentPeriodicPayment
Liabilities held for sale of discontinued operations, current
Disposal Group, Including Discontinued Operation, Liabilities, Current [Abstract]
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]
In Process Research and Development [Member]
In Process Research and Development (IPR&D) [Member]
Plan Name [Domain]
Other Pension, Postretirement and Supplemental Plans [Member]
Other Pension, Postretirement and Supplemental Plans [Member]
Class Of Warrant Or Right Assumed During Period
Class of warrant or right assumed during period.
Class of Warrant or Right, Assumed During Period (in shares)
Warrants assumed with the acquisition of Viewpoint (Note 4) (in shares)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Entity [Domain]
Building
Building [Member]
Equity Method Investment, Ownership Percentage
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]
Current State and Local Tax Expense (Benefit)
State
Business Description and Basis of Presentation [Text Block]
Description of Business
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]
Notes payable
Certificates of Deposit [Member]
Finite lived Patents And Trademarks Gross
Finite lived patents and trademarks gross.
Patents and trademarks
Class of Warrant or Right, Outstanding (in shares)
Class of Warrant or Right, Outstanding
Balance (in shares)
Balance (in shares)
Tax Period [Axis]
Amount of liabilities forgiven by the acquirer as part of consideration transferred in a business combination.
Note receivable and interest from Viewpoint forgiven
Piper Sandler & Co. and UBS Securities LLC [Member]
Piper Sandler & Co. and UBS Securities LLC.
Related and Nonrelated Parties [Axis]
Property, Plant and Equipment, Policy [Policy Text Block]
Property and Equipment
VMT Option or Program License Option [Member]
VMT option or program license option.
Disposal Group Name [Domain]
Entity Address, City or Town
Finitelived Intangible Assets Future Amortization Expense Table Text Block
Finitelived intangible assets future amortization expense.
Future Amortization Expense
Number of reportable segments
us-gaap_NumberOfReportableSegments
Security Exchange Name
Intangible assets, in-process research and development
Indefinite-Lived Intangible Assets (Excluding Goodwill)
Indefinite-lived intangible assets, Net Carrying Value
Indefinite-lived intangible assets, Cost
Indefinite-lived intangible assets, Net Carrying Value
Pre-funded Warrants [Member]
Prefunded Warrants [Member]
Prefunded Warrants [Member]
Relating to Prefunded Warrants.
Property and equipment, gross
Debt Securities, Available-for-Sale, Unrealized Gain (Loss)
Available-for-Sale Securities, Estimated Fair Value
Short-term investments, fair value
Intangible Assets Disclosure [Text Block]
Intangible Assets and Other Assets, Net
Counterparty Name [Axis]
Net loss from continuing operations
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Total
Represents lease with Energy Northwest.
Lease With Energy Northwest [Member]
Prepaid Service Contract Cost
Prepaid Service Contract Cost
Prepaid service contracts
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent
Share-based compensation expense on discontinued operations
Maximum amount of securities offer and sale
Maximum Amount Of Securities Offer And Sale
Maximum amount of securities offer and sale.
Defined Contribution Plan Employer Matching Contribution First Percent Of Contributions Used In Company Match
Percentage of participants contributions that will be matched by employer.
Defined Contribution Plan, Employer Matching Contribution, First Percent of Contributions Used in Company Match
Measurement Input Type [Domain]
Antidilutive Securities, Name [Domain]
Foreign tax effects, Percent
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Measurement Basis [Axis]
Statistical Measurement [Domain]
Warrant exercise price per share
us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Balance (in dollars per share)
Balance (in dollars per share)
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)
us-gaap_AssetsCurrent
Total current assets
us-gaap_AllocatedShareBasedCompensationExpense
Share-based compensation
Document Period End Date
Fair Value Hierarchy and NAV [Domain]
Lantheus Investment Agreement [Member]
Lantheus Investment Agreement
Lantheus Investment Agreement [Member]
Represents Lantheus Investment Agreement.
Effective Income Tax Rate Reconciliation Changes In Unrecognized Tax Benefits
Effective income tax rate reconciliation changes in unrecognized tax benefits.
Changes in unrecognized tax benefits, Percent
ICFR Auditor Attestation Flag
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number
Number of Stock Options Outstanding, Exercisable
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)
Impairment to IPR&D assets
In-process research and development impairment
Indefinite-lived intangible assets, Impairment
Stock Redeemed or Called During Period, Value
Cancellation of fractional shares due to the 1-for-10 reverse stock split
Accounts Receivable, after Allowance for Credit Loss [Abstract]
us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Loss on disposal of property and equipment
Statement of Financial Position [Abstract]
Assets held for sale of discontinued operations, current
Disposal Group, Including Discontinued Operation, Assets, Current [Abstract]
Revenue [Policy Text Block]
Grant Revenue Recognition
March 2024 Private Placement [Member]
March 2024 Private Placement [Member]
Represents the March 2024 private placement.
Income Taxes Paid Net of Refunds Received [Table Text block]
Income taxes paid net of refunds received.
Summary of Income Taxes Paid (Net of Refunds Received)
Antidilutive Security, Excluded EPS Calculation [Table]
Capitalization of Research and Development Costs
Capitalization of research and development costs.
Capitalization of research and development costs
Class of Stock [Axis]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions
Number of available-for-sale securities
Deferred Tax Liabilities, Net
Net deferred tax assets (liabilities)
Net deferred tax liabilities
Noncurrent liabilities:
Non-current liabilities:
Current Income Tax Expense (Benefit)
Total current expense (benefit)
Debt Securities, Available-for-Sale, Realized Gain (Loss)
Debt Securities, Available-for-Sale, Realized Gain (Loss), Total
Available-for-sale securities, realized gains or losses
Net Sales Greater Than $15.0 Million [Member]
Net Sales Greater Than 15 Million [Member]
Relating to net sales greater than $15 million.
Schedule of Change in Asset Retirement Obligation [Table Text Block]
us-gaap_Liabilities
Total liabilities
Lessee, operating lease, discount rate
us-gaap_LesseeOperatingLeaseDiscountRate
Class Of Warrant Or Right Expired
Class of warrant or right expired.
Warrants expired (in shares)
Aggregate Cost Of Modifications
Aggregate cost of modifications.
Aggregate cost of modifications
Financial Instruments [Domain]
Stock issued during period shares common stock warrant exercised.
Stock Issued During Period Shares Common Stock Warrant Exercised
Issuance of common stock pursuant to exercise of warrants (in shares)
Deferred Income
Increase (Decrease) in Deferred Revenue
Represents Office Space With Unico Properties.
Office Space With Unico Properties [Member]
Equity Method Investments [Policy Text Block]
Equity Method Investment
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount
Foreign tax effects
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Total
Accruals and reserves
2026
2027
Warrants exercised (in shares)
Class Of Warrant Or Right Exercised During Period
Class of warrant or right exercised during period.
Disposal Groups, Including Discontinued Operations [Table]
May 2024 pre-funded warrants.
May 2024 Pre-funded Warrants [Member]
Indefinite-Lived Intangible Assets, Major Class Name [Domain]
Prepaid Expense and Other Assets, Current [Abstract]
Finite-Lived Intangible Assets, Gross
Total other assets
Available-for-sale securities, that were in a gross unrealized loss position for than 12 months or more
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions
Diluted
Weighted Average Number of Shares Outstanding, Diluted
Weighted Average Number of Shares Outstanding, Diluted, Total
Entity File Number
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax, Total
Unrealized loss on available-for-sale securities
Unrealized gain (loss) on available-for-sale securities
Total other assets, net
Other Assets
Cover [Abstract]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum
Expected volatility, minimum
Cash and Cash Equivalent [Abstract]
Measurement Input Type [Axis]
Debt instrument, number of monthly payments
Represents number of installment to pay debt.
catx_DebtInstrumentNumberOfPaymentInstallment
Income Tax Reconciliation Nondeductible Expense Net operating loss expirations
Income tax reconciliation nondeductible expense net operating loss expirations.
Net operating loss expirations
Accounts payable and accrued expenses
Prepaid expenses and other current assets
Prepaid expenses and other current assets
Total prepaid expenses and other current assets
Investments [Domain]
Interest and other expense
Interest and other expense
Interest and Other Expense
Interest and other expense.
The amount of fair value of options and warrants assumed in business acquisition.
catx_BusinessCombinationOptionsAndWarrantsAssumption
Assumption of Viewpoint stock options and warrants at fair value
Summary of Valuation Allowance [Table Text Block]
Summary of Changes in Valuation Allowance
Options exercise price per share
Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.
Options assumed, Price (in dollars per share)
Weighted Average Exercise Price per Share, Options assumed
Scenario [Domain]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)
Sale of Stock [Domain]
Deferred Tax Assets Lease Liability
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from lease liabilities.
Lease liability
General and administrative
Series B Preferred Stock [Member]
Series B Preferred Stock [Member]
Stock issued during period value warrants Exercised
Stock issued during period value warrants Exercised.
Issuance of stock pursuant to exercise of common stock warrants
Issuance of common stock in exchange for Viewpoint common stock, net(in shares)
Stock Issued During Period, Shares, Acquisitions
Non-Rule 10b5-1 Arrangement Modified [Flag]
Non-Rule 10b5-1 Arrangement Modified Flag.
Non-Rule 10b5-1 Arrangement Modified
us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Net loss
Class Of Warrant Or Right Exercise Price Of Warrants Or Rights Exercised
Class of warrant or right exercise price of warrants or rights exercised.
Warrants exercised (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period
Options issued
Deferred Tax Assets, Other
Other
Disposal group including discontinued operation, costs of goods sold and estimated reduction of reserve
Disposal group including discontinued operation, costs of goods sold and estimated reduction of reserve.
Cost of sales
Investment agreement, contingent amount of gross proceeds raised
Investment Agreement Contingent Amount Of Gross Proceeds Raised
Represents the amount of gross proceeds raised as part of an investment agreement.
Finite-Lived Intangible Assets, Net
Finite-Lived Intangible Assets, Net, Ending Balance
Finite-Lived Intangible Assets, Net, Beginning Balance
Total future amortization expense
Operating lease, expense
us-gaap_OperatingLeaseExpense
Underwritten Offering.
Underwritten Offering [Member]
Offering [Member]
Warrants Exercisable On Or Before December 18 2027 Member
Warrants exercisable on or before December 18 2027.
Warrants Exercisable on or Before December 18, 2027 [Member]
Lantheus Holdings, Inc. [Member]
Lantheus Holdings, Inc.
Lantheus [Member]
Property, Plant and Equipment, Useful Life
Estimated useful lives
New Accounting Pronouncements, Policy [Policy Text Block]
Recently Adopted and Recently Issued Accounting Pronouncements
Summary of Future Operating Lease Payments and Lease Liability
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent
Other, Percent
Number Of Employees
Number of employees.
Number of employees
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Total liabilities assumed
Deferred Tax Assets Valuation Allowance Recorded To Goodwill
Represents increases (decreases) in deferred tax asset valuation allowance attributable to goodwill.
Increases recorded to goodwill
Unrecognized Tax Benefits, Period Increase (Decrease)
Unrecognized Tax Benefits, Period Increase (Decrease), Total
Gross unrecognized tax benefits
Estimated Reduction of Reserve from Hazardous Waste Disposal Vendor
Estimated reduction of reserve from hazardous haste disposal vendor.
Estimated reduction of reserve from hazardous waste disposal vendor
Interest in GT Medical
Estimated fair value
Disposal Group, Including Discontinued Operation, Consideration
Risk-free rate, minimum
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum
Income (Loss) from Continuing Operations before Income Taxes, Domestic
United States
United States
Depreciation
Depreciation, Total
Depreciation expense
Depreciation, Total
Other Receivables, Net, Current
Other Receivables, Net, Current, Total
Other receivables
Lease term
Lessee, Operating Lease, Term of Contract
Common stock, shares outstanding
Common stock, outstanding (in shares)
Lease liability
Lease liability
Less current portion
Warrants issued (in dollars per share)
Class Of Warrant Or Right Exercise Price Of Warrants Or Rights Issued
Class of warrant or right exercise price of warrants or rights issued.
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Base prepaid rent
Deferred Rent Credit
Document Transition Report
Share-Based Payment Arrangement, Additional Disclosure [Abstract]
Radrelease Pharmaceuticals Llc Member
Radrelease Pharmaceuticals Llc.
RadRelease Pharmaceuticals LLC [Member]
Short-Term Investments, Total
Short-term investments
Short-term investments
us-gaap_OperatingExpenses
Total operating expenses
Research and development
Research and development
Disposal Group Including Discontinued Operation Research and Development Expense
Amount of research and development expense attributable to disposal group, including, but not limited to, discontinued operation.
Leases
Lessee, Operating Leases [Text Block]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Expense (Benefit) for Income Taxes
Statement of Cash Flows [Abstract]
Current Federal Tax Expense (Benefit)
Federal
Amount raised through selling of equity
Stock Issued During Period, Value, New Issues
Issuance of common stock, net
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent
Share-based compensation, Percent
Equity [Text Block]
Stockholders' Equity
Finite-Lived Intangible Assets [Line Items]
Discontinued Operations and Disposal Groups [Abstract]
Financial instruments measured at fair value
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value, Ending Balance
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value, Beginning Balance
Discontinued Operations, Disposed of by Sale [Member]
Discontinued Operations, Disposed of by Sale [Member]
Aggregate sales price
Sale of Stock, Consideration Received Per Transaction
Net loss
Net loss
Right-of-use asset, net
Disposal Group Including Discontinued Operation Property Right Of Use Asset Current
Amount classified as right of use asset attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.
Effective Income Tax Rate Reconciliation Non deductible Expense Net Operating Loss Expirations
Effective income tax rate reconciliation non deductible expense net operating loss expirations.
Net operating loss expirations, Percent
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value
Aggregate Intrinsic Value
Long-Term Purchase Commitment, Amount
Purchasing commitment
Write-off of inventory associated with discontinued product
Write-off of inventory associated with discontinued product
Write-off of inventory associated with discontinued product
Debt instrument balloon payment
us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid
Adjustments To Additional Paid In Capital, Issuance of Pre-funded Warrants
Adjustments to additional paid in capital, issuance of pre-funded warrants.
Issuance of Pre-funded Warrants, net
Warrants Exericsable On Or Before October 22 2025 Member
Warrants exericsable on or before October 22 2025.
Warrants Exericsable on or Before October 22, 2025 [Member]
Other Nonoperating Income
Other income from a related party (Note 3)
Other income from a related party
2026 Offering [Member]
Two Thousand Twenty Six Offering [Member]
2026 Offering.
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Expected dividend yield
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Intangible Assets, Net (Excluding Goodwill)
Intangible Assets, Net (Excluding Goodwill)
Rule 10b 51 Arr Modified [Flag]
Rule 10b 51 Arr Modified Flag.
Rule 10b5-1 Arrangement Modified
ASSETS
Assets [Abstract]
Construction in Progress [Member]
us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Prepaid expenses and other current assets
Principal payments
us-gaap_RepaymentsOfDebt
Commercial Paper, at Carrying Value
Commercial paper
Document Fiscal Year Focus
CASH FLOWS FROM INVESTING ACTIVITIES:
Retirement Benefits [Abstract]
Warrants Exercisable On Or Before December 31 2027 Member
Warrants exercisable on or before December 31 2027.
Warrants Exercisable on or Before December 31, 2027 [Member]
Percent of outstanding shares
Percent Of Outstanding Shares
Represents the percent of outstanding shares.
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Summary of Components of Loss Before Income Taxes by U.S. and Foreign Jurisdictions
Research and Development Expenses [Member]
Research and Development Expense [Member]
Research and Development [Member]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
Available-for-Sale Securities
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
Loss recognized on classification as held for sale
Gain (Loss) on Disposition of Business
Loss on divestiture
Deferred Federal Income Tax Expense (Benefit)
Federal
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
Prepaid Expenses and Other Current Assets
Percentage of ownership considered for warrant exercise two.
Percentage Of Ownership Considered for Warrant Exercise Two
Percentage of ownership considered for warrant exercise
Research Tax Credit Carryforward [Member]
Research Tax Credit Carryforward [Member]
One-time payment received for rights granted
One-Time Payment Received For Rights Granted
One-time payment received for rights granted.
Finite-Lived Intangible Asset, Expected Amortization, Year One
2026
Finite-Lived Intangible Assets Amortization Expense [Table Text Block]
Amortization Expense
Revision of Prior Period [Domain]
Fair Value Measurement, Policy [Policy Text Block]
Fair Value Measurement
Unrecognized Tax Benefits [Roll Forward]
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share
Gain (loss) from discontinued operations, Diluted
Weighted Average Cost of Capital [Member]
Weighted average cost of capital.
Proceeds from sales of common stock, pursuant to exercise of options
Proceeds from sales of common stock, pursuant to exercise of option
Fair Value Disclosures [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Issuance of common stock in exchange for Viewpoint common stock, net
Stock Issued During Period, Value, Acquisitions
Available-for-Sale Securities , Maturities
Available-for-Sale Securities ,Maturities
Effective Income Tax Rate Reconciliation, Tax Credit, Amount
Effective Income Tax Rate Reconciliation, Tax Credit, Amount, Total
Tax credits
Tax credits
2025
2026
Intangible Asset, Indefinite-Lived [Table]
Deferred Tax Assets Capitalized Research And Development
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from capitalized research and development.
Capitalized research and development costs
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
Net assets acquired, excluding goodwill
Summary of Pro Forma Computation of Earnings Per Share
Business Combination, Pro Forma Information [Table Text Block]
Debt Instrument [Axis]
Net Sales of $10.0 Million or Less [Member]
Net Sales Of 10 Million Or Less [Member]
Relating to net sales of $ 10 million or less.
Share-Based Payment Arrangement [Abstract]
Unrecognized compensation expense
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Estimated hazardous waste removal liability
Estimated Hazardous Waste Removal Liability
Estimated hazardous waste removal liability.
Deferred Tax Liabilities, Intangible Assets
Intangibles
Sale of Stock [Axis]
Deferred tax liability
Business combination, recognized identifiable assets acquired and liabilities assumed, deferred tax liabilities
Warrants issued (in shares)
Class Of Warrant Or Right Issued
Class of warrant or right issued.
Stockholder Plaintiff Settlements
Related to stockholder plaintiff settlements.
Stockholder Plaintiff Settlements [Member]
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash provided by (used in) investing activities
Title of 12(b) Security
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount
Share-based compensation
January two thousand twenty four pre-funded warrants.
January Two Thousand Twenty Four Pre-funded Warrants [Member]
January 2024 Pre-funded Warrants [Member]
Maximum increase or decrease in ownership percentage
Maximum Increase Or Decrease In Ownership Percentage
Maximum increase or decrease in ownership percentage.
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
Weighted Average Exercise Price per Share, Forfeited
Money Market Fund [Member]
Money Market Funds [Member]
Related and Nonrelated Parties [Domain]
Income Tax Disclosure [Text Block]
Income Taxes
Debt Securities, Available-for-Sale, Allowance for Credit Loss
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Ending Balance
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Beginning Balance
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Total
Credit allowance
Collaborative Arrangement and Arrangement Other than Collaborative [Table]
Maximum amount of securities offer and sell
Maximum Amount of Securities Offer and Sell
Maximum amount of securities offer and sell.
May two thousand twenty four pre-funded warrants.
May Two Thousand Twenty Four Pre-funded Warrants [Member]
May 2024 Pre-funded Warrants [Member]
Stock Redeemed or Called During Period, Shares
Cancellation of fractional shares due to the 1-for-10 reverse stock split (in shares)
Cancellation of fractional shares due to the 1-for-10 reverse stock split (in shares)
Other Liabilities, Noncurrent
Other noncurrent liabilities
Consolidated Entities [Axis]
Legal Entity [Axis]
Changes in operating assets and liabilities:
Business acquisition, closing market price
Business acquisition, price per share (in dollars per share)
Oppenheimer & Co [Member]
Oppenheimer Co [Member]
Represents the Oppenheimer & Co.
Summary of Property and Equipment
Property, Plant and Equipment [Table Text Block]
Summary of Estimated Useful Lives/Property and Equipment
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Weighted Average Exercise Price per Share, Beginning Balance
Weighted Average Exercise Price per Share, Ending Balance
Income Tax Disclosure [Abstract]
Fair Value, Recurring and Nonrecurring [Table]
January 2024 public offering.
January 2024 Public Offering [Member]
Investment Agreements [Abstract]
Investment agreements.
Merger
Business Combination [Text Block]
Unrecognized Tax Benefits
Ending balance
Beginning balance
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Impairment
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount
Class Of Warrant Or Right Weighted Average Exercise Price Of Recalculation Of Warrants Outstanding After Reverse Split
Class of warrant or right weighted average exercise price of recalculation of warrants outstanding after reverse split.
Adjustment based on recalculation of warrants outstanding after Reverse Split (Note 1) (in dollars per share)
Measurement Frequency [Domain]
Statement of Income Location, Balance [Axis]
Amended two thousand twenty incentive plan.
Amended Two Thousand Twenty Incentive Plan [Member]
Amended 2020 Incentive Plan [Member]
Trading Symbol
Intangible Asset, Finite-Lived [Table]
Property and Equipment
Property, Plant and Equipment Disclosure [Text Block]
Open Tax Year
Open Tax Year
Related Party Transaction [Table]
Risk-free rate, maximum
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum
Registered offering.
Registered Offering [Member]
Subsequent Event Type [Axis]
Revision of Prior Period, Adjustment [Member]
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Intangible Assets Net of Accumulated Amortization
Prepaid expenses and other current assets
Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current
Employee-related Liabilities, Current, Total
Employee-related Liabilities, Current
Accrued personnel expenses
CASH FLOWS FROM FINANCING ACTIVITIES:
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term
Expected term (in years)
Fair Value, Recurring [Member]
Schedule of Equity Method Investments [Line Items]
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less: imputed interest
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent
U.S. federal R&D tax credits, Percent
U.S. federal R&D tax credits, Percent
Placement agents cash fee, percentage
Placement Agents Cash Fee Percentage
Represents the cash fee percentage.
Equity Components [Axis]
Summary of Carrying Values and Fair Values of Financial Instruments
Debt Securities, Held-to-Maturity [Table Text Block]
us-gaap_NonoperatingIncomeExpense
Total non-operating income, net
Equity Component [Domain]
Goodwill and Intangible Assets Disclosure [Abstract]
Deferred Tax Assets, Deferred Income
Deferred Income
Summary of Preliminary Purchase Price Allocation
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
Document Annual Report
Notes To Financial Statements [Abstract]
Business Combination [Axis]
Prepaid Insurance
Prepaid insurance
Isoray [Member]
Isoray.
Isoray [Member]
Note payable, net of current portion
Note payable, long-term portion
Note payable, long-term portion
Depreciation expense and amortization
Depreciation, Depletion and Amortization, Nonproduction
Depreciation, Depletion and Amortization, Nonproduction, Total
Note receivable, forgiven amount, loan
Note receivable
Note receivable
Building and Building Improvements [Member]
Building Modifications [Member]
US Treasury and Government [Member]
Securities of U.S. Government and Government Agencies [Member]
Equity Method Investment, Nonconsolidated Investee [Axis]
Maximum [Member]
Maximum [Member]
Statistical Measurement [Axis]
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Weighted Average Exercise Price per Share, Exercised
Finite-Lived Intangible Assets, Accumulated Amortization
Less: Accumulated amortization
Common stock, $.001 par value; 750,000,000 shares authorized; 280,571,026 and 142,112,766 shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively
Common stock: $0.001 par value; authorized 750,000,000 shares; issued 74,337,990 and 70,671,464 shares
Proceeds from sales of common stock and Pre-funded Warrants, net
Proceeds from sales of common stock and Pre-funded Warrants, net.
Proceeds from the sales of common stock and Pre-funded Warrants, net
Payments to Acquire Other Productive Assets
Additions to other assets
Consolidation, Policy [Policy Text Block]
Basis of Presentation and Principles of Consolidation
Sales and marketing
Disposal Group Including Discontinued Operation Sales and Marketing Expense
Amount of sales and marketing expense attributable to disposal group, including, but not limited to, discontinued operation.
Royalty [Member]
Equipment [Member]
Equipment [Member]
Research and Development Equipment [Member]
Income (Loss) from Continuing Operations, Per Diluted Share
Loss from continuing operations, Diluted
Deferred Tax Assets, Operating Loss Carryforwards
Deferred Tax Assets, Operating Loss Carryforwards, Total
Net operating loss carryforwards
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]
Tax Credit Carryforward [Axis]
Deferred Tax Assets, Valuation Allowance Increased
Deferred tax assets, valuation allowance increased.
Deferred tax assets, valuation allowance increased
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent
State income taxes, net of federal benefit, Percent
Website Development Member
Website development.
Website Development [Member]
Entity Public Float
Preferred stock, shares authorized
Preferred stock, shares authorized (in shares)
Preferred Stock, Shares Authorized (in shares)
Finite-Lived Intangible Assets by Major Class [Axis]
Summary of Note Payable
Schedule of Debt [Table Text Block]
Related Party Transaction [Line Items]
Business Combination [Table]
Entity Registrant Name
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total
Notes Payable
Debt Disclosure [Text Block]
Entity Voluntary Filers
2026
Finite-Lived Intangible Asset, Expected Amortization, Year Two
Short-Term Investments [Policy Text Block]
Short-term investments policy text block.
Short-Term Investments
Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.
Operating Loss Carryforwards With No Expiration
Operating Loss Carryforwards, With No Expiration
Pre-funded Warrants [Member]
Pre-funded warrants member.
Pre-funded Warrants [Member]
Deferred State and Local Income Tax Expense (Benefit)
State
Series D Preferred Stock [Member]
Subsequent Events [Abstract]
Accounts payable and accrued expenses
us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
Accounts payable and accrued expenses
Cybersecurity Risk Management Positions or Committees Responsible [Flag]
Consolidated Entities [Domain]
2027
Finite-Lived Intangible Asset, Expected Amortization, Year Three
Total income tax benefit:
Income Tax Expense (Benefit)
Income taxes paid (net of refunds received)
Intangible Assets Measurement Input
Represents measurement of intangibles assets.
Intangible assets, measurement input
Available-for-Sale Securities, Unrealized Losses
Debt Securities, Available-for-Sale, Unrealized Loss
Short-term investments, gross unrealized loss
Available-for-Sale Securities, Unrealized Losses
Measurement Frequency [Axis]
Proceeds from issuance of common stock
Proceeds from the ATM Agreement, net
Proceeds from the issuance of common stock
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share
Gain (loss) from discontinued operations, Basic
Entity Common Stock, Shares Outstanding
Accrued vacation
Amount of accrued vacation, assumed at the acquisition date.
catx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedVacation
Disposal Group Classification [Axis]
Base prepaid Rent
Operating Lease Prepaid Rent Expense
Operating lease prepaid rent expense.
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total
Accumulated other comprehensive income (loss)
Change in valuation allowance attributable to net operating losses
Change in Valuation Allowance Attributable to Net Operating Losses
Change in valuation allowance attributable to net operating losses.
Additions to property and equipment
Payments to Acquire Property, Plant, and Equipment, Total
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Additions to property and equipment
us-gaap_Assets
Total assets
Property, Plant and Equipment [Table]
Income Tax Paid, State and Local, after Refund Received
Income Tax Paid, State and Local, after Refund Received, Total
U.S. state
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term (years), Exercisable
Class of Financing Receivable [Domain]
Income Statement [Abstract]
Share-Based Payment Arrangement [Policy Text Block]
Share-Based Compensation
Gross proceeds from closing of underwritten offering
Gross proceeds from closing of underwritten offering.
Deferred income tax benefit
Deferred income tax benefit
Deferred tax benefit
Deferred Income Tax Expense (Benefit)
Total deferred income tax benefit:
The Houston TX [Member]
Houston Texas.
Houston Texas [Member]
Liability, Defined Benefit Plan
Liability, Defined Benefit Plan, Total
Liability, Defined Benefit Plan
Expiring Between 2033 And 2044 [Member]
Expiring between 2033 and 2044.
Shares issued and sell
Stock issued during period, shares
Issuance of common stock, net (in shares)
Business Combination [Abstract]
Diluted loss per share
Earnings Per Share, Diluted
Diluted loss per share
Gross Proceeds From Agreements Including Upfront Payment
Gross proceeds from agreements including upfront payment.
Gross proceeds from agreements including upfront payment
Chicago Illinois.
Chicago IL [Member]
The Chicago IL [Member]
City Area Code
Business Combination, Pro Forma Information, Pro Forma Revenue
Grant revenue
Auditor Name
Additional Stock-Based Compensation Expense
Additional stock-based compensation expense.
Additional stock-based compensation expense
Cesium-131 Business [Member]
Cesium-131 Business [Member]
Relating to Cesium-131 Business.
Discontinued operations, Provision (benefit) for income taxes
Discontinued Operation, Tax Effect of Discontinued Operation
Percentage of ownership considered for warrant exercise
Percentage Of Ownership Considered for Warrant Exercise
Percentage of ownership considered for warrant exercise.
Debt instrument, face amount
us-gaap_DebtInstrumentFaceAmount
Pursuant to the Evergreen Provision in the Amended and Restated Plan [Member]
Pursuant to the “evergreen” provision in the Amended and Restated Plan member.
Pursuant to the "Evergreen" Provision in the Amended and Restated Plan [Member]
Business Combination [Line Items]
Defined Benefit Plan [Table]
Deferred Tax Assets, Tax Credit Carryforwards
Deferred Tax Assets, Tax Credit Carryforwards, Total
Tax credits
Limited liability company, Formation date
Limited Liability Company or Limited Partnership, Business, Formation Date
Counterparty Name [Domain]
U.S. federal R&D tax credits
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount
U.S. federal R&D tax credits
Restricted Cash and Investments [Abstract]
Litigation Case [Axis]
Operating lease, weighted average remaining term
us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Stockholders' Equity Note, Stock Split, Conversion Ratio
Reverse stock split, ratio
Disposal Group Name [Axis]
Cash and Cash Equivalents, Policy [Policy Text Block]
Cash Equivalents
Lease with Board of Regents.
Lease with Board of Regents [Member]
Business combination, fair value of common stock
Perspective Therapeutics common stock issued (13,654,507 x $4.00)
Debt Securities, Available-for-Sale, Accrued Interest, Receivable
Debt securities, available-for-sale, accrued interest, receivable.
Accrued interest receivable on available-for-sale securities
Property and equipment, net
Property and equipment, net
Property and equipment, net
Deferred Foreign Income Tax Expense (Benefit)
Foreign
Restricted Assets Disclosure [Text Block]
Restricted Cash
Total cash, cash equivalents and restricted cash shown on the consolidated statements of cash flows
Cash and cash equivalents at beginning of period
CASH AND CASH EQUIVALENTS AT END OF PERIOD
Operating loss
Operating loss
Operating loss
Accumulated Deficit [Member]
Retained Earnings [Member]
Net loss before deferred income tax benefit
Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax
Share-Based Payment Arrangement, Noncash Expense, Total
us-gaap_ShareBasedCompensation
Share-based compensation
Purchase price
Asset purchase price in cash
Asset Acquisition, Consideration Transferred
Asset Acquisition, Consideration Transferred, Total
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months
Available-for-sale securities that were in a gross unrealized loss position for less than 12 months, fair value
Operating lease, weighted average discount rate
us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Noncurrent lease liability
Lease liability, net of current portion
Lease liability, non-current
Level 1 [Member]
Fair Value, Inputs, Level 1 [Member]
Class of Stock [Line Items]
Notes to Financial Statements
Disclosure Text Block [Abstract]
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash provided by financing activities
Note payable
Note payable
Auditor Location
Deferred tax liability
Deferred Income Tax Liabilities, Net
Office Space in Seattle WA [Member]
Office space in Seattle WA.
Other Assets [Policy Text Block]
Other assets policy text block.
Prepaid Expenses and Other Assets
Expiring Between 2026 And 2037 [Member]
Expiring Between 2026 And 2037.
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
Warrant Activity
Non-operating income (expense):
Marketable Securities [Table Text Block]
Summary of Company's of Available-for-sale Securities Measured at Fair Value on Recurring Basis
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
Grants receivable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Schedule of Securities Not Considered in Calculation of Diluted Weighted Average Shares
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Corporate Debt Securities [Member]
Corporate Debt Securities [Member]
Income Tax Jurisdiction [Domain]
Debt Securities, Available-for-Sale [Table]
Entity Interactive Data Current
Statement of Income Location, Balance [Domain]
Fair Value Measurement [Domain]
CASH FLOWS FROM OPERATING ACTIVITIES:
Furniture and Fixtures [Member]
Furniture and Fixtures [Member]
General and administrative
Disposal Group, Including Discontinued Operation, General and Administrative Expense
Gross profit
Gross profit
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)
Business acquisition, number of common shares exchanged
Common stock issued pursuant to merger, Shares
Business acquisition, shares (in shares)
Schedule of Indefinite-Lived Intangible Assets [Table Text Block]
Summary of Components of Indefinite-lived Intangible Assets
Warrants Exercisable On Or Before November242027 Member
Warrants exercisable on or before November242027.
Warrants Exercisable on or Before November 24, 2027 [Member]
Program Preclinical Co-Funding Option [Member]
Program preclinical co-funding option.
Held-to-maturity investments
us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss
Increase (Decrease) in Other Noncurrent Liabilities
Other noncurrent liabilities
Cash equivalents
Cash Equivalents, at Carrying Value
Total cash equivalents
Components of Deferred Tax Liabilities [Abstract]
Deferred tax liabilities:
Entity Tax Identification Number
Number of renewal options
Lessee Operating Lease Number Of Renewal Options
Lessee operating lease number of renewal options.
Land
Land [Member]
us-gaap_RepaymentsOfNotesPayable
Repayment of notes payable
Equity [Table]
Equity [Table]
Available-for-sale securities, that were in a gross unrealized loss position for less than 12 months
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions
Held to Maturity Investments [Policy Text Block]
Held to Maturity Investments [Policy Text Block]
Held-to-Maturity Investments
Gross proceeds from public offering
Proceeds from Issuance or Sale of Equity
Proceeds from Issuance or Sale of Equity, Total
Local Phone Number
Available-for-Sale Securities, Unrealized Gains
Debt Securities, Available-for-Sale, Unrealized Gain
Weighted-average number of common shares used in computing net loss per share, basic and diluted:
Weighted average number of common shares used in computing net loss per share, basic and diluted:
Auditor Opinion [Text Block]
Auditor Opinion
Net cash acquired in acquisition of Viewpoint
Accounting Policies [Abstract]
Payments for Capital Improvements
Aggregate cost of building modifications
Previously Reported [Member]
Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table]
Recognition of operating lease liability and right-of-use asset
Recognition of Operating Lease liability and Right of Use Asset
Recognition of operating lease liability and right of use asset.
2028
Cash and Cash Equivalents [Member]
Cash and Cash Equivalents [Member]
Class of Stock [Domain]
Commercial Paper [Member]
Unrecognized compensation expense, weighted-average expected recognition period
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Office Equipment [Member]
Office Equipment [Member]
VMT option.
VMT Option [Member]
Cash, cash equivalents and short-term investments
Cash, Cash Equivalents, and Short-Term Investments
Total cash equivalents and available-for-sale securities
Grant revenue
Grant revenue
Stock Issued During Period Shares Prefunded Warrants Exercised
Stock issued during period shares prefunded warrants exercised.
Issuance of common stock pursuant to the exercise of Pre-funded Warrants, net (in shares)
Stock, Class of Stock [Table]
Class Of Warrant Or Right Weighted Average Exercise Price Of Warrants Or Rights Expired
Class of warrant or right weighted average exercise price of warrants or rights expired.
Warrants expired (in dollars per share)
Entity Emerging Growth Company
Indefinite-Lived Intangible Assets [Axis]
Asset retirement obligation
Disposal Group Including Discontinued Operation Asset Retirement Obligation Current
Amount classified as asset retirement obligation attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.
Net loss from discontinued operations
Disposal Group, Including Discontinued Operation, Operating Income (Loss)
Total gain (loss) from discontinued operations
Tax Credit Carryforward, Name [Domain]