Cover [Abstract] Entity Registrant Name Entity Central Index Key Document Type Amendment Flag Current Fiscal Year End Date Entity Small Business Entity Shell Company Entity Emerging Growth Company Entity Current Reporting Status Document Period End Date Entity Filer Category Document Fiscal Period Focus Document Fiscal Year Focus Entity Common Stock Shares Outstanding Document Quarterly Report Document Transition Report Entity File Number Entity Incorporation State Country Code Entity Tax Identification Number Entity Address Address Line 1 Entity Address Address Line 2 Entity Address City Or Town Entity Address State Or Province Entity Address Postal Zip Code City Area Code Local Phone Number Security 12b Title Trading Symbol Security Exchange Name Entity Interactive Data Current UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS ASSETS Current Assets Cash and cash equivalents Prepaid expenses and other current assets Total Current Assets [Assets, Current] Other Assets Prepaid project costs and other long-term assets Trademarks Total Assets [Assets] LIABILITIES AND STOCKHOLDERS' EQUITY Current Liabilities Accounts payable and accrued liabilities Total Current Liabilities [Liabilities, Current] Commitments and contingencies - Note 5 Stockholders' Equity Preferred stock, $0.001 par value, 10,000,000 authorized shares, no shares issued and outstanding at June 30, 2026 and December 31, 2025 Common stock, $0.001 par value, 100,000,000 authorized shares, 37,404,544 shares and 33,407,495 shares issued and outstanding at June 30, 2026 and December 31, 2025, respectively Additional paid-in capital Accumulated deficit Total Stockholders' Equity [Equity, Attributable to Parent] Total Liabilities and Stockholders' Equity [Liabilities and Equity] Preferred stock, shares par value Preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Common stock, shares par value Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS Revenue Operating Expenses General and administrative Research and development Total Operating Expenses [Operating Expenses] Operating Loss [Operating Income (Loss)] Other Income Interest income Total Other Income [Other Nonoperating Income (Expense)] Net Loss Before Income Taxes [Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest] Income taxes Net Loss [Net Income (Loss) Attributable to Parent] Net Loss Per Common Share Basic and diluted Weighted Average Number of Common Shares Outstanding Basic and diluted [Weighted Average Number of Shares Outstanding, Diluted] UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS EQUITY Statement [Table] Statement [Line Items] Equity Components [Axis] Common Stock Additional Paid-In Capital Accumulated Deficit Balance, shares [Shares, Issued] Balance, amount Issuance of restricted share awards, shares Issuance of restricted share awards, amount Share settlement for withholding taxes paid upon vesting of restricted stock awards, shares [Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation] Share settlement for withholding taxes paid upon vesting of restricted stock awards, amount [Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation] Shares issued - registered offerings - net of offering costs, shares Shares issued - registered offerings - net of offering costs, amount Shares issued upon the exercise of options, shares Shares issued upon the exercise of options, amount Stock-based compensation for shares issued to consultants and directors, shares Stock-based compensation for shares issued to consultants and directors, amount Stock-based compensation for equity awards Net loss Balance, shares Balance, amount UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Operating Activities Net Loss Adjustments to reconcile net loss to net cash used in operating activities: Stock-based compensation Changes in operating assets and liabilities: Prepaid expenses and other current assets [Increase (Decrease) in Prepaid Expense and Other Assets] Prepaid project costs and other long-term assets [Increase (Decrease) in Other Noncurrent Assets] Accounts payable and accrued liabilities [Increase (Decrease) in Accounts Payable and Accrued Liabilities] Net Cash Used in Operating Activities [Cash Provided by (Used in) Operating Activity, Including Discontinued Operation] Investing Activities Trademarks [Payments to Acquire Intangible Assets] Net Cash Used in Investing Activities [Cash Provided by (Used in) Investing Activity, Including Discontinued Operation] Financing Activities Proceeds from sale of common stock in public offerings Issuance costs related to sale of common stock in public offerings [Payments of Stock Issuance Costs] Net proceeds from the exercise of stock options Payments for taxes related to net share settlement of equity awards [Payment, Tax Withholding, Share-Based Payment Arrangement] Net Cash Provided by Financing Activities [Cash Provided by (Used in) Financing Activity, Including Discontinued Operation] Net Increase in Cash and Cash Equivalents [Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation] Cash and Cash Equivalents, Beginning of Period Cash and Cash Equivalents, End of Period Insider Trading Arrangements [Line Items] Material Terms of Trading Arrangement [Text Block] Rule 10b5-1 Arrangement Adopted [Flag] Rule 10b5-1 Arrangement Terminated [Flag] Non-Rule 10b5-1 Arrangement Adopted [Flag] Non-Rule 10b5-1 Arrangement Terminated [Flag] Basis of Presentation, Summary of Significant Accounting Policies, and Recent Accounting Pronouncements Basis of Presentation, Summary of Significant Accounting Policies, and Recent Accounting Pronouncements Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Fair Value Measurements Fair Value Measurements Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Prepaids and Other Assets Prepaids and Other Assets Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Stockholders Equity Stockholders' Equity Equity [Text Block] Stock-Based Compensation Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Net Loss Per Share Earnings Per Share [Text Block] Segment Reporting Segment Reporting Segment Reporting Disclosure [Text Block] Subsequent Events Subsequent Events Subsequent Events [Text Block] Basis of Presentation Summary of Significant Accounting Policies Certain Risks and Uncertainties Recent Accounting Pronouncements Schedule of fair value of financial instruments Schedule of prepaid expenses and other current assets Schedule of prepaid project costs and other long-term assets Schedule of accounts payable and accrued liabilities Schedule of stock based compensation expense Schedule of stock based compensation expense included in company's operating expenses Schedule of restricted stock awards activity Schedule of performance based restricted stock awards Summary of outstanding securities excluded from diluted weighted shares outstanding Schedule of summarizes the expense categories segment reporting Product and Service [Axis] Gateway for Accelerated Innovation in Nuclear (GAIN) Percentage of research and development expense Class of Stock [Axis] Level 1 Level 2 Level 3 Cash and cash equivalents [Cash and Cash Equivalent] Cash Federally insured amount Cash equivalents, at carrying value Advance payments to BEA Prepaid insurance Prepaid project development costs Other Prepaid expenses and other current assets [Other Prepaid Expense, Current] Advance payments to BEA [Advance payments to BEA] Prepaid project development costs [Prepaid project development costs] Other [Prepaid Expense Other, Noncurrent] Prepaid project costs and other long-term assets [Prepaid project costs and other long-term assets] Total short-term and long-term advance payments to BEA Total short-term and long-term prepaid R&D project development costs Trade payables Accrued research and development expenses Accrued bonus Accrued legal and consulting expenses Total [Accounts Payable and Accrued Liabilities] Other commitment Related and Nonrelated Parties [Axis] Geographical [Axis] Jefferies [Member] ATM Offerings [Member] Net proceeds form sale of stock Stock sold during period Outstanding restricted stock awards and performance stock awards Common stock, shares outstanding Common stock remaining available for issuance Shelf registration statement, description Shelf registration statement, amount ATM agreement offering amount Award Type [Axis] Stock Options [Member] Common Stock Awards [Member] Restricted Stock Awards [Member] Performance Share Awards [Member] Stock-based compensation expense Plan Name [Axis] Research And Development Expense [Member] General And Administrative Expense [Member] Total stock-based compensation expense Restricted Stock Award [Member] Outstanding at beginning of period Awards, Granted Awards, vested [Awards, vested] Awards, forfieted [Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures] Outstanding at end of period Weighted average fair value grant date, beginning [Share-Based Compensation Arrangement by Share-Based Payment Award, Option, Nonvested, Weighted Average Exercise Price] Weighted average fair value grant date, granted Weighted average fair value grant date, vested Weighted average fair value grant date, forfeited Weighted average fair value grant date, ending Performance-based Restricted Stock Awards [Member] Awards, Granted Awards, forfieted Weighted average fair value grant date, granted Weighted average fair value grant date, vested Weighted average fair value grant date, forfeited Independent Members of Board of Directors [Member] External Consultant [Member] New Employees [Member] 2020 Equity Incentive Plan [Member] Perfomance Stock Award [Member] Tranche-based PSAs [Member] April 2025 PSAs [Member] Outstanding balance Awards, granted Stock-based compensation expense Unrecognized compensation cost PSAs granted Shares withheld to satisfy tax obligations Net shares issued Stock-based compensation expense related to accelerated vesting Weighted average grant date fair value [Weighted average grant date fair value] Restricted stock awards, vested Fair value of restricted stock awards, vested Reversal of stock-based compensation expense under tranche-based PSAs Weighted average grant date fair value Remaining weighted-average vesting period Total number of common stock available for future issuance Restricted Stock Awards [Member] Perfomance Stock Award [Member] Stock Options [Member] [Stock Options [Member]] Antidilutive securities excluded from computation of earnings per share Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Reporting Unit [Axis] INL Project [Member] CODM [Member] Other Outside R&D Expenses [Member] Project Development [Member] Employee compensation [Member] IT expenses [Member] Revenue General and administrative Other segment item Research and development expense Subsequent Event Type Axis Subsequent Event [Member] Aggregate RSAs authorized