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Percentage of credit and utilization improvement Scenario [Axis] Gross Profit Gross Profit Gross profit Common Stock, Dividends, Per Share, Cash Paid Dividends per common share Loss on disposal of healthcare assets Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Schedule of Accrued Liabilities [Table Text Block] Schedule of Accrued Liabilities Operating Lease, Liability Net minimum lease payments Operating Lease, Liability, Total Outstanding under the Revolving Credit Facility Long-Term Line of Credit Long-Term Line of Credit, Total Gain (Loss) On Disposal Of Healthcare Assets And Related Charges Gain (loss) on disposal of healthcare assets and related charges. Total loss Loss on disposal of healthcare assets and related charges Loss on disposal of healthcare assets and related charges Commitments and Contingencies Commitments and contingencies (Note 3) Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Common stock - Diluted Minimum [Member] Minimum Non-current assets: Assets, Noncurrent [Abstract] All Other Assets Written-off All other assets written-off. All other Cash dividends paid on common and Class B common stock Payments of Ordinary Dividends, Common Stock Common Stock, Shares, Issued Common stock, issued (in shares) Common stock issued Segment Reporting [Line Items] Segment Reporting Information [Line Items] Income Tax Expense (Benefit), Total Income tax benefit Income tax benefit Income tax provision Income tax provision Intangible Assets, Finite-Lived, Policy [Policy Text Block] Intangible Assets Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Percent Decrease in foreign tax credit haircut percent Deferred income taxes Deferred Income Taxes and Tax Credits Deferred income taxes Deferred Income Taxes and Tax Credits, Total Repayments of Lines of Credit Line of credit repaid Operating Segments [Member] Operating Segments Finite-Lived Intangible Assets, Major Class Name Intangible Asset, Finite-Lived, Class [Domain] Stock Issued During Period, Value, Conversion of Convertible Securities Class B converted to common Contract liabilities Contract with Customer, Liability Contract with Customer, Liability, Total Contract Liabilities, Beginning Balance Contract Liabilities, Ending Balance Aggregate principal amount Line of Credit Facility, Maximum Borrowing Capacity Income Tax Authority, Name [Axis] Subsequent Event Type [Domain] Cost of Product and Service Sold Cost of Goods and Services Sold, Total Cost of sales Operating Lease Liability Noncurrent Statement Of Financial Position [Extensible List] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Lessee, Operating Lease, Liability, Undiscounted Excess Amount Less imputed interest Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Effect of exchange rate changes on cash and cash equivalents Nonoperating Income (Expense) Total other expense Total other (expense) income Schedule of Long-Term Debt Instruments [Table] Disposal Group, Including Discontinued Operation, Inventory, Current Inventories, net Schedule Of Healthcare Asset Sales Transactions [Table Text Block] Schedule of healthcare asset sales transactions. Schedule of Healthcare Asset Sales Transaction Income Statement [Abstract] Receivables, Net, Current Receivables, Net, Current, Total Accounts Receivable Income Tax Jurisdiction [Axis] Income Tax Authority Lease, Cost [Table Text Block] Components of Lease Costs Impairment of Property, Plant and Equipment, Net Impairment of property, plant and equipment, net Impairment of property, plant and equipment, net to satisfy ALTA CT supply agreement Intangible Asset, Finite-Lived [Table] Schedule Of Finite Lived Intangible Assets [Table] Earnings Per Share, Basic Earnings Per Share, Basic Earnings Per Share, Basic, Total Common stock - Basic Schedule of earning per share. Schedule Of Earning Per Share [Line Items] Schedule Of Earning Per Share [Line Items] Document Period End Date Document Period End Date Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Remaining 2027 Document Information [Table] Document Information [Table] Intangible Asset, Finite-Lived, after Accumulated Amortization Intangible assets, net Finite-Lived Intangible Assets, Net, Beginning Balance Finite-Lived Intangible Assets, Net, Ending Balance Intangible Assets, Net Debt Instrument [Line Items] Legal Matters and Contingencies [Text Block] Risks and Uncertainties North America [Member] North America Common Stock, Shares Authorized Common stock authorized Common stock shares, authorized Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two 2029 Statement of Stockholders' Equity [Abstract] Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Operating Leases Standard and Extended Product Warranty Accrual Warranty reserves Standard and Extended Product Warranty Accrual, Total Standard and Extended Product Warranty Accrual, Beginning Balance Standard and Extended Product Warranty Accrual, Ending Balance Prepaid Expense and Other Assets, Current Prepaid expenses and other assets Accounting Standards Update and Change in Accounting Principle [Text Block] New Accounting Pronouncements - Not Yet Adopted Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block] Schedule of the Amortization Expense for the Next Five Years Segment assets. Segment Assets Segment assets Total segment assets Common Class B [Member] Common Class B Common Stock Class B Assets Total assets Title of 12(b) Security Title of 12(b) Security Denominator for Basic and Diluted Earnings Per Share: Denominator For Basic And Diluted Earnings Per Share [Abstract] Denominator for Basic and Diluted Earnings Per Share: Stock Issued During Period, Value, Stock Options Exercised Options exercised Operating Lease, Payments Operating cash flows from operating leases Rental expense Schedule of earning per share. Schedule Of Earning Per Share [Table] Schedule Of Earning Per Share [Table] Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent, Total Effective income tax (benefit) provision rate Effective income tax provision rate The number of votes per share. Number Of Votes Per Share Number of votes per share Variable Rate [Axis] Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Remaining 2027 Lessee, Operating Lease, Liability, to be Paid, Year One 2028 Interest rate of credit facility Line of Credit Facility, Interest Rate During Period Customer Relationships [Member] Customer Relationships Nature of Operations [Text Block] Description of the Company Segment Reporting [Table Text Block] Schedule of Operating Results by Segment Lease Obligations Lessee, Operating Leases [Text Block] Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four 2031 Earnings Per Share, Diluted [Abstract] Net income per share: Net income per share: Ending Balance Equity, Attributable to Parent Beginning Balance Total stockholders' equity Assets and Liabilities, Lessee [Abstract] Lease Type Entity Address, Address Line Two Entity Address, Address Line Two Other Assets, Noncurrent Other non-current assets Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Income Tax Disclosure [Text Block] Income Taxes Income Tax Jurisdiction, Domestic State and Local [Member] State and Local Jurisdiction Bill and Hold Arrangement [Member] Bill and hold arrangement. Bill-and-Hold Arrangement Earnings Per Share Earnings Per Share [Text Block] Percentage Tax Benefit Measured Based On Largest Benefit Percentage tax benefit measured based on largest benefit. Percentage tax benefit measured based on largest benefit Revolving Credit Facilities [Text Block] Revolving Credit Facilities [Text Block] Revolving Credit Facility Number of Reportable Segments Number of reportable segments Credit Facility [Axis] Inventory, Policy [Policy Text Block] Inventories, net Revolving Credit Facility Revolving Credit Facility [Member] Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation, Percent Tax Cuts and Jobs Act, Bonus depreciation Geographical [Domain] Geographical Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three 2030 Earnings Type [Domain] Earnings type. Earnings Type Statistical Measurement [Axis] Statistical Measurement Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Comprehensive income: Net Assets by Geographic Region [Table Text Block] Net Assetsby Geographic Region Table [Text Block] Schedule of Net Assets by Geographic Region Entity Interactive Data Current Entity Interactive Data Current Accrued Payroll Taxes, Current Compensation and payroll taxes Lessee, Operating Lease, Liability, to be Paid, Year Three 2030 Common Stock, Value, Issued Common stock value Common stock, $0.05 par value; 12,481 and 12,362 shares issued and outstanding on November 29, 2025 and May 31, 2025, respectively Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Raw material Inventory, Raw Materials, Gross Proceeds from Sale of Property, Plant, and Equipment Proceeds from Sale of Property, Plant, and Equipment, Total Proceeds from sale of property, plant and equipment Total liabilities Liabilities Foreign exchange gain Gain (Loss), Foreign Currency Transaction, before Tax Foreign Currency Transaction Gain (Loss), before Tax, Total Foreign exchange gain Foreign exchange (loss) gain Disposal Group, Including Discontinued Operation, Intangible Assets, Noncurrent Intangible assets, net Deferred Tax Assets, Valuation Allowance Deferred tax valuation allowance Retained Earnings (Accumulated Deficit), Total Retained Earnings (Accumulated Deficit) Retained earnings Assets sold: Assets Sold [Abstract] Assets sold. Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accounts Payable, Total Liabilities, Noncurrent [Abstract] Non-current liabilities: Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis of Presentation Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Change in assets and liabilities: Increase (Decrease) in Prepaid Expense Prepaid expenses and other assets Lease, Cost [Abstract] Supplemental Unemployment Benefits, Severance Benefits Accrued severance Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Accounts receivable Variable Rate [Domain] Intangible Asset, Finite-Lived, Accumulated Amortization Total Accumulated Amortization Assets, Noncurrent Total non-current assets Consolidated operating lease expense Operating Lease, Cost Income Tax, Policy [Policy Text Block] Income Taxes Intangible Asset, Finite-Lived, Acquired, Weighted-Average Amortization Period Weighted average number of years of amortization expense Summary Of Significant Accounting Policies [Line Items] Summary of significant accounting policies. Base rate Base Rate [Member] Limit Of Cash Dividends Class B Common Stock The percentage rate of Class A dividends as computed for Class B dividend limitation. Limit of cash dividends Class B common stock (percent) Lease liabilities current Operating Lease, Liability, Current Repayment of revolving credit facility Repayments of Long-Term Lines of Credit Liabilities and Equity Total liabilities and stockholders’ equity Lessee, Operating Lease, Liability, to be Paid, Year Two 2029 Intangible Asset, Finite-Lived, Class [Axis] Finite-Lived Intangible Assets by Major Class Lessee, Lease, Description [Table] Document Fiscal Period Focus Document Fiscal Period Focus Operating lease right of use segment asset. Operating Lease Right Of Use Segment Asset Operating lease ROU asset Right of use lease assets, net Long-Lived Asset, Disposed of Other than by Sale, Gain (Loss) from Disposal Loss (gain) on disposal of property, plant and equipment Schedule of cash leasing activity. Schedule Of Cash Leasing Activity Table [Text Block] Schedule of Cash Activities Associated with our Leases Excess Inventory Components Write-Off Excess inventory components write-off. Excess inventory components Letters of Credit Outstanding, Amount Letter of credits outstanding amount Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Operating Lease Right Of Use Asset Statement Of Financial Position [Extensible Enumeration] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Increase (decrease) in cash and cash equivalents Entity Current Reporting Status Entity's Reporting Status Current Common and Class B Common Stock Common and Class B Common Stock [Policy Text Block] Common and class B common stock. Deferred Revenue Deferred Revenue, Total Deferred revenue Class of Stock [Domain] Class of Stock Accounts Payable, Current Accounts payable Accounts Payable, Current, Total Document Transition Report Document Transition Report Commitments and Contingencies Disclosure [Abstract] Increase (Decrease) in Inventories Inventories Increase (Decrease) in Inventories, Total Liabilities, Current [Abstract] Current liabilities: Common Stock [Member] Common Stock Proceeds from Lines of Credit, Total Proceeds from Lines of Credit Proceeds from Line of Credit Credit Facility [Domain] Statistical Measurement [Domain] Statistical Measurement Intangible Asset, Finite-Lived, before Accumulated Amortization Total Gross Amounts Finite-Lived Intangible Assets, Gross, Total Equity, Attributable to Parent [Abstract] Stockholders’ Equity Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic, Total Common stock - Basic Assets [Abstract] Assets Entity Central Index Key Entity Central Index Key Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Consolidation Items [Axis] Current Fiscal Year End Date Current Fiscal Year End Date Increase (Decrease) in Accrued Liabilities Accrued liabilities Increase (Decrease) in Accrued Liabilities, Total Document Quarterly Report Document Quarterly Report Intangible assets - NBV Intangible Assets - Net Book Value Write-Off Intangible assets - net book value write-off. Percentage of Services Revenue Percentage of services revenue. Percentage of services revenue Numerator for Basic and Diluted Earnings Per Share: Numerator For Basic And Diluted Earnings Per Share [Abstract] Numerator for Basic and Diluted Earnings Per Share: Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Loss (gain) on disposal of property, plant and equipment Loss (gain) on disposal of property, plant and equipment Interest income Investment Income, Net Investment Income, Net, Total Interest income Credit facility agreement term Line of Credit Facility, Expiration Period Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash provided by operating activities Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Earnings Per Share, Diluted Earnings Per Share, Diluted Earnings Per Share, Diluted, Total Common stock - Diluted Dividends Less dividends Dividends, Total Operating Lease, Weighted Average Discount Rate, Percent Weighted average interest rate, operating leases Net income Net income Property plant and equipment segment reporting. Property Plant And Equipment Segment Reporting Net property, plant and equipment Property, plant and equipment, net Accrued Liabilities [Abstract] Accrued Liabilities: Sales price to Direct Med Disposal Group, Including Discontinued Operation, Consideration Weighted average number of shares. Weighted Average Number Of Shares [Abstract] Weighted average number of shares: Schedule of weighted average remaining lease terms and interest rates of leases. Schedule Of Weighted Average Remaining Lease Terms And Interest Rates Of Leases Table [Text Block] Schedule of Weighted Average Remaining Lease Terms and Interest Rates of Leases Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Technology-Based Intangible Assets [Member] Technology Income Tax Jurisdiction [Domain] Income Tax Authority Scenario [Domain] Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total Foreign currency translation, net of tax Foreign currency translation (loss) gain, net of tax Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Schedule of Contract Balances Equity Components [Axis] Accumulated Other Comprehensive Income (Loss) Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Investing activities: Statement of Cash Flows [Abstract] Income Tax Disclosure [Abstract] Letter of credit issue fee percentage Line of Credit Facility, Commitment Fee Percentage Stock Issued During Period, Shares, Restricted Stock Award, Gross Restricted stock issuance (in shares) Dividends [Abstract] Dividends paid to: Depreciation, Depletion and Amortization Depreciation and amortization Depreciation, Depletion and Amortization, Total Preferred Stock, Shares Authorized Preferred stock authorized Class of Stock [Axis] Class of Stock Common stock options anti-dilutive Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of Operating Segments Number of operating segments AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) Deferred Income Tax Assets, Net Non-current deferred income taxes Deferred income tax assets, net Adjustments to Additional Paid in Capital, Restricted Stock Issued, Adjustments to additional paid in capital, restricted stock issued. Restricted stock issuance Power and microwave technologies group. Power And Microwave Technologies Group [Member] PMT Inventories, net Inventory, Net Inventory, Net, Total Inventory Diluted. Diluted [Member] Diluted Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Noncurrent Property, plant and equipment, net Accrued Liabilities, Current Accrued liabilities Accrued Liabilities Inventory, Work in Process, Gross Work in progress Intangible Asset, Goodwill and Other [Abstract] Document Type Document Type Undistributed Earnings, Diluted Undistributed earnings (loss) Undistributed earnings Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Operating activities: Disposal Group, Including Discontinued Operations [Line Items] Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity Payments to Acquire Productive Assets Capital expenditures Payments to Acquire Productive Assets, Total Lessee, Lease, Description [Line Items] Subsequent Event [Member] Subsequent Event Operating Income (Loss) Operating income Increase (Decrease) in Other Operating Assets and Liabilities, Net Other Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total Canvys. Canvys [Member] Canvys Disposal Group Classification [Axis] Dividends, Common Stock, Cash Common Segment Reporting [Table] Schedule Of Segment Reporting Information By Segment [Table] Securities Act File Number Entity File Number Inventory, Finished Goods, Gross Finished goods Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Schedule of Future Minimum Lease Payments under Operating Leases Location, Statement of Income, Balance [Axis] Retained Earnings [Member] Retained Earnings Proceeds from (Payment for) Other Financing Activity Other Accrued Liabilities, Policy Accrued Liabilities Policy [Text Block] Accrued Liabilities DirectMed Imaging, LLC DirectMed Imaging LLC. DirectMed Imaging LLC [Member] Entity Registrant Name Entity Registrant Name Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Schedule Of Earnings Per Share Basic By Common Class [Table] Accounting Policies [Abstract] Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total Net income Net income (loss) Selling, General and Administrative Expense Selling, General and Administrative Expense, Total Selling, general and administrative expenses Effective Income Tax Rate Reconciliation, NCTI, Percent Effective income tax rate reconciliation, Global Intangible Low-Taxed Income percent Entity Address, Address Line One Entity Address, Address Line One Line of Credit Facility, Expiration Date Credit facility expiration date ALTA CT Supply Agreement [Member] ALTA CT supply agreement. ALTA CT Supply Agreement [Member] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Disposal of Healthcare Assets and Related Charges Line of credit consolidated earnings before interest taxes depreciation and amortisation with asset purchase. Line of Credit Consolidated Earnings Before Interest Taxes Depreciation and Amortisation with Asset Purchase Consolidated EBITDA connection with asset purchase Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Options exercised (in shares) Assets, Current Total current assets Income Tax Jurisdiction, Foreign [Member] Foreign Tax Authority Segments [Axis] Segments Income Tax Authority, Name [Domain] Proceeds from Divestiture of Businesses Sales price to Direct Med Proceeds from disposal of Healthcare assets Supplemental Cash Flow Information [Abstract] Supplemental Disclosure of Cash Flow Information: Global energy solutions. Global Energy Solutions [Member] GES Entity Small Business Entity Small Business Limit Of Cash Dividends Class A Common Stock Limit of cash dividends class A common stock. Limit of cash dividends Class A common stock (percent) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Effect of dilutive securities dilutive stock options Inventory Valuation Reserves Inventory valuation reserves Significant Accounting Policies [Text Block] Summary of Accounting Policies Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Accounts Receivable, after Allowance for Credit Loss, Current, Total Accounts receivable, less allowance for credit losses of $274 and $350, respectively Consolidation Items [Domain] Finite-lived intangible assets, amortization expense, after year four. Finite Lived Intangible Assets Amortization Expense After Year Four Thereafter Effective Income Tax Rate Reconciliation, FDDEI, Percent Effective income tax rate reconciliation, Foreign-Derived Intangible Income percent Summary of Disposal Loss of Healthcare Assets and Related Charges Summary of Disposal Loss of Healthcare Assets and Related Charges [Table Text Block] Summary of disposal loss of healthcare assets and related charges [table text block]. Earnings Per Share [Abstract] Net loss per share: Net income per share: Disposal Group, Including Discontinued Operation, Transaction Related Costs Disposal group, including discontinued operation, transaction related costs. Transaction related costs Schedule of net assets and liabilities related to operating leases. Schedule Of Net Assets And Liabilities Related To Operating Leases [Table Text Block] Schedule of Net Assets and Liabilities Related to Operating Leases Fixed Assets Net Book Value Fixed assets net book value. Fixed assets - NBV Lessee, Operating Lease, Liability, to be Paid, Year Four 2031 Subsequent Event Type [Axis] Other Charges [Abstract] Other charges [abstract] Other charges: Allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Financing activities: Liabilities, Noncurrent Total non-current liabilities Euro RFR Euro Risk Free Rate [Member] Euro risk free rate. Entity Tax Identification Number Entity Tax Identification Number Stock Issued During Period, Shares, Conversion of Convertible Securities Class B converted to Common Class B converted to common (in shares) Standard Product Warranty, Policy [Policy Text Block] Warranties Equity Component [Domain] Equity Component Lease liabilities current Operating and finance lease liability current. Operating And Finance Lease Liability Current Entity Address, City or Town Entity Address, City or Town Business Combination [Axis] Intangible Asset, Finite-Lived [Line Items] Finite-Lived Intangible Assets [Line Items] Unrealized Gain (Loss), Foreign Currency Transaction, after Tax Unrealized foreign currency gain Segments [Domain] Segments Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity [Domain] Lessee operating lease liability payments due after year four. Lessee Operating Lease Liability Payments Due After Year Four Thereafter Proceeds from revolving credit facility Proceeds from Long-Term Lines of Credit Contract with Customer, Liability, Current Current contract liability Statement [Table] Statement [Table] Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest (Loss) income before income taxes Income before income taxes Entity Shell Company Entity Shell Company Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash used in investing activities Represents inventory provisions. Inventory Provisions Inventory provisions Statement [Line Items] Statement [Line Items] Maximum Maximum [Member] Debt Disclosure [Abstract] Proceeds From Disposal Of Healthcare Assets Proceeds from disposal of healthcare assets. Proceeds from IMES sale attributable to disposal of healthcare assets Disposal Groups, Including Discontinued Operations [Table] Business Combination [Domain] Lease liabilities non-current Operating and finance lease liability noncurrent. Operating And Finance Lease Liability Noncurrent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Federal statutory rate US Public Law 115-97, Transition Tax for Accumulated Foreign Earnings, Liability Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Total Tax Cuts and Jobs Act, domestic research cost expensing pursuant to IRC Commitments and Contingencies, Policy [Policy Text Block] Loss Contingencies Earnings type. Earnings Type [Axis] Earnings Type Document and entity information. Document And Entity Information [Abstract] APIC, Share-Based Payment Arrangement, Option, Increase for Cost Recognition Stock options Risks and Uncertainties [Abstract] Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Adjustments to reconcile net income to cash provided by operating activities: Current assets: Assets, Current [Abstract] Accrued Professional Fees, Current Professional fees Liability for interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total Document Fiscal Year Focus Document Fiscal Year Focus Share-Based Payment Arrangement, Noncash Expense [Abstract] Share-based compensation: Common Stock, Shares, Outstanding Ending Balance (in shares) Beginning Balance (in shares) Common stock, outstanding (in shares) Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Business Combination [Line Items] Loss on write-down of healthcare related inventory not disposed of Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down Basis Of Presentation Basis Of Presentation [Abstract] Intangible Asset, Finite-Lived, after Accumulated Amortization, Estimated Amortization Expense, Fiscal Year Maturity [Abstract] Fiscal Year Revenue from Contract with Customer [Policy Text Block] Revenue Recognition Excess Fixed Assets Write-Off Excess fixed assets write-off. Excess fixed assets Lease liabilities non-current Operating Lease, Liability, Noncurrent Contract with Customer, Liability, Revenue Recognized Revenue recognized upon satisfaction of performace obligations Intangible Asset, Finite-Lived [Table Text Block] Schedule of Intangible Assets Subject to Amortization Latin America [Member] Latin America Lessee, Operating Lease, Liability, to be Paid Total lease payments Total future minimum lease payments Other Accrued Liabilities, Current Other accrued expenses Additional Paid in Capital, Common Stock Additional paid-in-capital Security Exchange Name Security Exchange Name APIC, Share-Based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition Restricted stock New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements - Not Yet Adopted Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share Basic [Line Items] Undistributed Earnings, Basic Undistributed earnings (loss) Undistributed earnings Entity Address, State or Province Entity Address, State or Province Right of use lease assets Operating Lease, Right-of-Use Asset Right of use lease assets, net Amendment Flag Amendment Flag Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right of use assets obtained in exchange for lease liabilities Other Nonoperating Income (Expense) Other, net Other Nonoperating Income (Expense), Total Other, net Tax Credit Carryforward, Valuation Allowance Valuation allowance pertaining to deferred tax asset Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] SOFR Rate Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Total City Area Code City Area Code Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Organization, Consolidation and Presentation of Financial Statements [Abstract] Proceeds from Issuance of Common Stock Proceeds from issuance of common stock Liability for Uncertainty in Income Taxes, Noncurrent Reserve for uncertain tax position related to continuing operations, excluding interest and penalties Earnings per basic and diluted share. Earnings Per Basic And Diluted Share [Abstract] Global Supply Agreement [Member] Global supply agreement. Global Supply Agreement Basic. Basic [Member] Basic Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Legal Entity [Axis] Credit facility extended agreement term Line of Credit Facility Extended Expiration Period Line of Credit Facility Extended Expiration Period Liabilities, Current Total current liabilities Noncash Investing and Financing Items [Abstract] Non-cash activities: Liability for interest Unrecognized Tax Benefits, Interest on Income Taxes Accrued Segment Reporting [Text Block] Segment Information Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Trading Symbol Trading Symbol Geographical [Axis] Geographical Foreign currency translation, net of tax Foreign Currency Transaction And Translation Adjustment Including Adjustments To Retained Earnings Net Of Tax Foreign currency transaction and translation adjustment including adjustments to retained earnings net of tax. Entity Emerging Growth Company Entity Emerging Growth Company Additional Paid-in Capital [Member] Additional Paid-In Capital Sale Of Healthcare Assets Discloure [Text Block] Sale of healthcare assets. Sale of Healthcare Assets to Directmed Imaging, LLC. Disposal Group Classification [Domain] Other Liabilities, Noncurrent Other non-current liabilities Deferred income tax liabilities Accrued Income Taxes, Noncurrent Common Class A [Member] Common Stock Common Europe [Member] Europe Business Combination [Table] Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] Unallocated other. Unallocated Other [Member] Other Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Percentage of unused line fee Operating Lease, Weighted Average Remaining Lease Term Weighted average remaining lease term in years, operating leases Revenue from Contract with Customer [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated other comprehensive income Share-Based Payment Arrangement, Noncash Expense Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense, Total Cash and Cash Equivalent Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value, Total Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash provided by (used in) financing activities Accounting Changes and Error Corrections [Abstract] Discontinued Operations and Disposal Groups [Abstract] Gain (Loss) On Sale Of Healthcare Assets Gain (loss) on sale of healthcare assets. Loss on sale of Healthcare assets Loss on sale of Healthcare assets Amount of paid and unpaid Class B common stock dividends declared with the form of settlement in cash. Dividends Common Stock Cash Class B Class B Summary Of Significant Accounting Policies [Table] Summary of significant accounting policies. Healthcare segment. Healthcare Segment [Member] Healthcare ALTA CT X-ray Tubes, Manufacturing Period ALTA CT X-ray tubes, manufacturing period. ALTA CT X-ray tubes, manufacturing period Entity Filer Category Entity Filer Category Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description Assets written-off: Assets written-off [Abstract] Assets written-off. Increase (Decrease) in Accounts Receivable Accounts receivable Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One 2028 Asia Pacific [Member] Asia/Pacific Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Property, plant and equipment, net Property, Plant and Equipment, Net, Total Disposed of Asset Sale [Member] Disposed of asset sale. Asset Sale [Member] Revenue from Contract with Customer, Excluding Assessed Tax Net Sales Net sales Document Information [Line Items] Document Information [Line Items] Agreement Term Agreement term. Agreement term Segment Reporting [Abstract] Other Assets, Current Other current assets Entity Address, Postal Zip Code Entity Address, Postal Zip Code Statement of Financial Position [Abstract] Local Phone Number Local Phone Number