Cover [Abstract] Document Information [Table] Document Information [Line Items] Document Type Document Annual Report Document Period End Date Document Transition Report Securities Act File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line Two Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Entity Listing, Par Value Per Share Trading Symbol Security Exchange Name Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company ICFR Auditor Attestation Flag Document Financial Statement Error Correction [Flag] Entity Shell Company Entity Public Float Entity Common Stock, Shares Outstanding Entity Central Index Key Document Fiscal Period Focus Document Fiscal Year Focus Amendment Flag Current Fiscal Year End Date Auditor Name Auditor Firm ID Auditor Location Documents Incorporated by Reference [Text Block] Statement of Financial Position [Abstract] Statement [Table] Statement [Line Items] Assets [Abstract] Assets: Assets, Current [Abstract] Current assets: Cash and Cash Equivalent Cash and cash equivalents Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net of allowance for doubtful accounts of $340 and $1,313 at January 2, 2026 and December 27, 2024, respectively Accounts Receivable, net Contract with Customer, Asset, and Construction Contractor, Receivable, Retainage, after Allowance for Credit Loss, Current Contract with Customer, Asset, and Construction Contractor, Receivable, Retainage, after Allowance for Credit Loss, Current Contract assets Contract assets Other Receivables, Net, Current Other receivables Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Assets, Current Total current assets Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Equipment and leasehold improvements, net Equipment and leasehold improvements, net Goodwill Goodwill at end of period Goodwill at beginning of period Goodwill Operating Lease, Right-of-Use Asset Right-of-use assets ROU Assets Finite-Lived Intangible Assets, Net Other intangible assets, net Total estimated amortization expense Other Assets, Noncurrent Other assets Other Deferred Income Tax Assets, Net Deferred income taxes, net Deferred income taxes Assets Segment assets Total assets Liabilities and Equity [Abstract] Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued liabilities Total accrued liabilities Business Combination, Contingent Consideration, Liability, Current Contingent consideration payable Contract with Customer, Liability, Current Contract liabilities Notes Payable, Current Notes payable Finance Lease, Liability, Current Less: Current obligations Finance lease obligations Operating Lease, Liability, Current Lease liability Less: Current obligations Liabilities, Current Total current liabilities Business Combination, Contingent Consideration, Liability, Noncurrent Contingent consideration payable, less current portion Notes Payable, Noncurrent Notes payable, less current portion Finance Lease, Liability, Noncurrent Noncurrent lease obligations Finance lease obligations, less current portion Operating Lease, Liability, Noncurrent Noncurrent lease obligations Lease liability, less current portion Other Liabilities, Noncurrent Other noncurrent liabilities Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies Equity, Attributable to Parent [Abstract] Stockholders' equity: Preferred Stock, Value, Issued Preferred stock, $0.01 par value, 10,000 shares authorized, no shares issued and outstanding Common Stock, Value, Issued Common stock, $0.01 par value, 40,000 shares authorized; 14,762 and 14,169 shares issued and outstanding at January 2, 2026 and December 27, 2024, respectively Additional Paid in Capital, Common Stock Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Retained Earnings (Accumulated Deficit) Retained earnings Equity, Attributable to Parent Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] Accounts Receivable, after Allowance for Credit Loss, Current Accounts Receivable, Allowance for Credit Loss, Current Accounts receivable, allowance for doubtful accounts Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract] Preferred Stock Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, shares authorized (in shares) Preferred Stock, Shares Issued Preferred stock, shares issued (in shares) Preferred Stock, Shares Outstanding Preferred stock, shares outstanding (in shares) Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract] Common Stock Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized (in shares) Common Stock, Shares, Issued Balance (in shares) Balance (in shares) Common stock, shares issued (in shares) Common Stock, Shares, Outstanding Common stock, shares outstanding (in shares) Income Statement [Abstract] Revenues [Abstract] Contract revenue Revenue from Contract with Customer, Excluding Assessed Tax Contract revenue Revenue Cost of Revenue [Abstract] Direct costs of contract revenue (inclusive of directly related depreciation and amortization): Cost, Direct Labor Salaries and wages Direct salaries and wages Subcontractor service costs and other direct costs incurred directly related to services rendered by an entity during the reporting period. Cost of Subcontractor Services and Other Direct Costs Subcontractor services and other direct costs Direct subcontractor services and other direct costs Cost of Revenue Total direct costs of contract revenue Gross Profit Gross profit Gross profit Operating Expenses [Abstract] General and administrative expenses: The aggregate amount of expenditures for salaries and wages (excluding the portion of technical and nontechnical salaries and wages incurred in connection with revenue producing projects) and payroll taxes, bonuses and employee benefit costs for all company personnel, excluding equity-based compensation. Labor and Related Expense, Excluding Stock-Based Compensation Salaries and wages, payroll taxes and employee benefits Occupancy, Net Facilities and facility related Share-Based Payment Arrangement, Noncash Expense Stock-based compensation Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Other Selling, General and Administrative Expense Other Operating Expenses Total general and administrative expenses Operating Income (Loss) Income (loss) from operations Income (Loss) from operations Nonoperating Income (Expense) [Abstract] Other income (expense): Interest Income (Expense), Nonoperating Interest expense, net Interest expense, net Other Nonoperating Income (Expense) Other, net Nonoperating Income (Expense) Total other expense, net Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Segment profit (loss) before income tax expense Income (Loss) before income taxes Income Tax Expense (Benefit) Income tax expense (benefit) Total provision for income taxes Income tax (benefit) expense Net income (loss) Net income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Unrealized gain (loss) on derivative contracts, net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income (loss) Earnings Per Share, Diluted [Abstract] Earnings (Loss) per share: Earnings Per Share, Basic Basic (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted-average shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted-average common shares outstanding-diluted (in shares) Diluted (in shares) Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Component [Domain] Parent [Member] Common Stock [Member] Common Stock Additional Paid-in Capital [Member] Additional Paid-in Capital AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) Retained Earnings [Member] Retained Earnings Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Stock Issued During Period, Value, Employee Stock Purchase Plan Shares of common stock issued in connection with employee stock purchase plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Shares of common stock issued in connection with employee stock purchase plan (in shares) Stock Issued During Period, Value, Stock Options Exercised Shares of common stock issued in connection with incentive stock plan Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Options, exercised (in shares) Shares of common stock issued in connection with incentive stock plan (in shares) Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Shares used to pay taxes on stock grants Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Shares used to pay taxes on stock grants (in shares) Stock Issued During Period, Value, Restricted Stock Award, Gross Issuance of restricted stock award and units Stock Issued During Period, Shares, Restricted Stock Award, Gross Issuance of restricted stock award and units (in shares) Stock Issued During Period, Value, Acquisitions Stock issued to acquire businesses Stock Issued During Period, Shares, Acquisitions Stock issued to acquire businesses (in shares) APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Stock-based compensation expense Other Comprehensive Income (Loss), Net of Tax Net current-period other comprehensive income (loss) Net unrealized gain (loss) on derivative contracts Statement of Cash Flows [Abstract] Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Cash flows from operating activities: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income (loss) Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Depreciation, Depletion and Amortization Depreciation and amortization Other Noncash Income (Expense) Other non-cash items Deferred Income Tax Expense (Benefit) Deferred income taxes, net Gain (Loss) on Disposition of Property Plant Equipment (Gain) loss on sale/disposal of equipment The cash flow impact of the provision for doubtful accounts. Provision for Doubtful Accounts Cash Flow Impact Provision for doubtful accounts Accretion and Fair Value Adjustments, Contingent Consideration Accretion and Fair Value Adjustments, Contingent Consideration Accretion and fair value adjustments of contingent consideration Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities, net of effects from business acquisitions: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Contract with Customer, Asset Contract assets Increase (Decrease) in Other Receivables Other receivables Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accrued Liabilities Accrued liabilities Increase (Decrease) in Contract with Customer, Liability Contract liabilities Amount of increase (decrease) in right of use assets. Increase (Decrease) in Right-of-use Assets Right-of-use assets Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash (used in) provided by operating activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Cash flows from investing activities: Payments to Acquire Property, Plant, and Equipment Purchase of equipment, software, and leasehold improvements Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale of equipment Payments to Acquire Businesses, Net of Cash Acquired Cash paid for acquisitions, net of cash acquired Cash consideration Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash (used in) provided by investing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Cash flows from financing activities: Amount of cash payments resulting from the contingent consideration arrangement. Business Acquisition, Contingent Consideration, Cash Payment Payments on contingent consideration Payments for Cash Deposits Held in Trust for Energy Incentive Rebate Payments, Restricted Cash, Financing Activities Payments for Cash Deposits Held in Trust for Energy Incentive Rebate Payments, Restricted Cash, Financing Activities Payment on restricted cash Repayments of Notes Payable Payments on notes payable Payments of Debt Issuance Costs Payments on debt issuance costs Proceeds from Long-Term Lines of Credit, Prior Term Loan and Line of Credit Proceeds from Long-Term Lines of Credit, Prior Term Loan and Line of Credit Borrowings under prior term loan and line of credit Repayments of Lines of Credit, Retire Prior Credit Agreement Repayments of Lines of Credit, Retire Prior Credit Agreement Payments made to retire prior credit agreement Proceeds from Long-Term Lines of Credit, New Credit Agreement Proceeds from Long-Term Lines of Credit, New Credit Agreement Borrowing to fund new credit agreement Repayments of Lines of Credit Principal payments on outstanding debt Finance Lease, Principal Payments Principal payments on finance leases Financing cash flow from finance leases Proceeds from Stock Options Exercised Proceeds from stock option exercise Proceeds from Stock Plans Proceeds from sales of common stock under employee stock purchase plan Payment, Tax Withholding, Share-Based Payment Arrangement Cash used to pay taxes on stock grants Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash (used in) provided by financing activities Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash, cash equivalents and restricted cash at end of period Cash, cash equivalents and restricted cash at beginning of period Total cash, cash equivalents, and restricted cash shown in the consolidated statement of cash flows Supplemental Cash Flow Information [Abstract] Cash paid (received) during the period for: Interest Paid, Excluding Capitalized Interest, Operating Activity Interest Income Taxes Paid, Net Income taxes Total