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$15,000 and $25,000 as of March 31, 2025 and December 31, 2024, respectively) Other short-term financing Other Short-Term Borrowings Net contract assets (liabilities) Contract With Customer, Asset (Liability) Contract With Customer, Asset (Liability) Power Systems Energy End Market [Member] Energy End Market [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Income Taxes Income Tax Disclosure [Text Block] Summary of Significant Accounting Policies and Other Information Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Year ending December 31, 2029 Lessee, Operating Lease, Liability, to be Paid, Year Four Earnings per common share: Earnings Per Share [Abstract] Equity [Abstract] Equity [Abstract] Accumulated deficit Retained Earnings (Accumulated Deficit) Finance ROU assets, net, statement of financial position, extensible list Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Net Sales Revenue from Contract with Customer Benchmark [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Inventories Increase (Decrease) in Inventories Debt issuance costs Debt Issuance Costs, Gross Schedule of Outstanding Debt Schedule of Debt [Table Text Block] Deferred income taxes Deferred Income Taxes and Tax Credits Litigation settlement payment Litigation Settlement, Amount Awarded to Other Party Year ending December 31, 2027 Long-Term Debt, Maturity, Year Two Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Weighted-average discount rate for operating leases (as percent) Operating Lease, Weighted Average Discount Rate, Percent Total operating lease liabilities Total lease liabilities Operating Lease, Liability Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Underlying Securities Award Underlying Securities Amount Payment for debt extinguishment or debt prepayment cost Payment for Debt Extinguishment or Debt Prepayment Cost Credit Facility [Axis] Credit Facility [Axis] Year ending December 31, 2030 Finance Lease, Liability, to be Paid, Year Five Purchases Cost of Goods and Service Benchmark [Member] Amendment Flag Amendment Flag Entity Registrant Name Entity Registrant Name Subordinated Debt Subordinated Debt [Member] Cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Gross profit Gross Profit Leasehold improvements Machinery and Equipment [Member] Schedule of Accrued Product Warranty Activities Schedule of Product Warranty Liability [Table Text Block] Fair Value as of Grant Date Award Grant Date Fair Value Amortization of right-of-use (“ROU”) asset Finance Lease, Right-of-Use Asset, Amortization Customer Concentration Risk Customer Concentration Risk [Member] Subsequent Events [Abstract] Subsequent Events [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Unamortized debt issuance costs Debt Issuance Costs, Net Debt Debt Disclosure [Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Geographical [Domain] Geographical [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Debt instrument, face amount Note payable Debt Instrument, Face Amount Schedule of Net Sales by End Market Disaggregation of Revenue [Table Text Block] Proceeds from short-term financings Proceeds from Short-Term Debt Entity Address, Postal Zip Code Entity Address, Postal Zip Code Consolidation Consolidation, Policy [Policy Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Weichai America Corp Weichai America Corp [Member] Weichai America Corp Note payable Notes Payable, Other Payables [Member] Customer C Customer C [Member] Customer C Title of 12(b) Security Title of 12(b) Security Concentration Risk Type [Axis] Concentration Risk Type [Axis] Common stock – $0.001 par value; 50,000 shares authorized; 23,117 shares issued; 23,008 and 23,000 shares outstanding at March 31, 2025 and December 31, 2024, respectively Common Stock, Value, Issued Operating cash flows paid for interest portion of finance leases Finance Lease, Interest Payment on Liability Number of outstanding letters of credit Number Of Outstanding Letters Of Credit Number Of Outstanding Letters Of Credit Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Raw materials Inventory, Raw Materials, Gross Schedule of Changes in Shares of Common and Treasury Stock Schedule of Common Stock Outstanding Roll Forward [Table Text Block] Cash used in financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Finished goods Inventory, Finished Goods, Gross Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Common Shares Outstanding Common Stocks, Including Additional Paid in Capital, Net of Discount [Abstract] Basic (in dollars per share) Earnings per share of common stock – basic (in dollars per share) Earnings Per Share, Basic Term of collaborative arrangement (in years) Collaborative Arrangement, Term Collaborative Arrangement, Term Operating cash flows paid for operating leases Operating Lease, Payments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Property, plant and equipment, net Property, plant and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Other Liabilities Disclosure [Abstract] Financing cash flows paid for principal portion of finance leases Finance Lease, Principal Payments Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Total current liabilities Liabilities, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Weighted-average common shares outstanding: Shares used in computing net income per share: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Other Non-current Liabilities Other Liabilities Disclosure [Text Block] TOTAL ASSETS Assets Cost of sales (from related parties $316 and $153 for the three months ended March 31, 2025 and 2024, respectively) Cost of Goods and Services Sold Income tax receivable Income Taxes Receivable, Current Other noncurrent liabilities Other Liabilities, Noncurrent Accrued Product Warranty Movement in Standard Product Warranty Accrual [Roll Forward] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Charged to expense Inventory Valuation Reserves, Charged To Expense Inventory Valuation Reserves, Charged To Expense Commitments and Contingencies (Note 10) Commitments and Contingencies Termination Date Trading Arrangement Termination Date Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Repayment of short-term financings Repayment of short-term financings Additional payments related to SLA Repayments of Short-Term Debt Year ending December 31, 2027 Lessee, Operating Lease, Liability, to be Paid, Year Two 2029 Purchase Obligation, to be Paid, Year Four Year ending December 31, 2026 Long-Term Debt, Maturity, Year One Schedule of Net Sales by Geographic Area Revenue from External Customers by Geographic Areas [Table Text Block] Entity Address, City or Town Entity Address, City or Town Debt Instrument [Axis] Debt Instrument [Axis] Long-term debt: Long-Term Debt, Other Disclosure [Abstract] Net income Net income Net income – basic and diluted Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Gary Winemaster v. The Company Gary Winemaster Versus The Company [Member] Gary Winemaster Versus The Company Discount amortization as interest expense Amortization of Debt Discount (Premium) Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Supplier recoveries Product Warranty Recoveries Product Warranty Recoveries Loss Contingencies [Table] Loss Contingencies [Table] Schedule of Components of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Entity File Number Entity File Number Finance Leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Revenue Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Purchased inventory Collaborative Arrangement, Inventory, Purchased Goods Collaborative Arrangement, Inventory, Purchased Goods Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Other accrued liabilities (to related parties $508 and $807 as of March 31, 2025 and December 31, 2024, respectively) Other accrued liabilities Total Estimated liability of fee expense Other Accrued Liabilities, Current Name Forgone Recovery, Individual Name Nine months ending December 31, 2025 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Weighted-average remaining lease term, operating leases (in years) Operating Lease, Weighted Average Remaining Lease Term Document Period End Date Document Period End Date Inventory allowance Balance at beginning of period Balance at end of period Inventory Valuation Reserves Finance lease liability, current Finance lease liabilities, current Finance Lease, Liability, Current Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Insider Trading Arrangements [Line Items] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount ROU assets obtained in exchange for lease obligations Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract] Right-Of-Use Asset Obtained In Exchange For Lease Liability Recovery per intentional or reckless violation Loss Contingency, Damages Sought, Value Per Intentional Violation Loss Contingency, Damages Sought, Value Per Intentional Violation Year ending December 31, 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Revenue recognized upon satisfaction of performance obligations Contract with Customer, Liability, Revenue Recognized Adjustment to Compensation: Adjustment to Compensation [Axis] Accounts Receivable Accounts Receivable [Member] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Subsidiary or Equity Method Investee, Sale of Stock, Type [Table] Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Total Purchase Obligation Litigation Case [Domain] Litigation Case [Domain] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Customer [Domain] Customer [Domain] Entity Current Reporting Status Entity Current Reporting Status Long-term debt Long-Term Debt, Excluding Notes Payable Long-Term Debt, Excluding Notes Payable Accumulated Deficit Retained Earnings [Member] Amortization of financing fees Amortization of Debt Issuance Costs Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Legal settlement Litigation Settlement, Fee Expense Basic (in shares) Weighted-average common shares outstanding – basic (in shares) Weighted Average Number of Shares Outstanding, Basic Related Party [Axis] Related and Nonrelated Parties [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] 2025 Purchase Obligation, to be Paid, Remainder of Fiscal Year Subsidiary, Sale of Stock [Line Items] Subsidiary, Sale of Stock [Line Items] Increase (Decrease) in Stockholders' Equity Common and Treasury Stock Increase (Decrease) in Stockholders' Equity [Roll Forward] North America (outside of United States) North America, Excluding United States [Member] North America, Excluding United States Executive Category: Executive Category [Axis] Name Awards Close in Time to MNPI Disclosures, Individual Name Construction in progress Construction in Progress [Member] Contract With Customer Contract With Customer [Member] Contract With Customer Entity Filer Category Entity Filer Category Revenue, remaining performance obligation, amount Revenue, Remaining Performance Obligation, Amount Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Company Selected Measure Name Company Selected Measure Name