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Disclosure - SHORT AND LONG-TERM DEBT - Line of credit (Details) link:presentationLink link:calculationLink link:definitionLink 99941303 - Disclosure - SHORT-TERM AND LONG-TERM DEBT - Summary of short-term and long-term debt (Details) link:presentationLink link:calculationLink link:definitionLink 99941401 - Disclosure - ACQUISITIONS - Allocation of purchase price (Details) link:presentationLink link:calculationLink link:definitionLink 99941503 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Amortization expenses (Details) link:presentationLink link:calculationLink link:definitionLink 41503 - Disclosure - LEASE OBLIGATIONS - Operating lease maturity schedule (Details) - Calc 2 link:presentationLink link:calculationLink link:definitionLink 99941603 - Disclosure - LEASE OBLIGATIONS - Operating lease maturity schedule (Details) link:presentationLink link:calculationLink link:definitionLink 99941604 - Disclosure - LEASE OBLIGATIONS - Operating lease expense (Details) link:presentationLink link:calculationLink link:definitionLink 995200400 - Statement - Consolidated Statements of Changes in Shareholders' Equity link:presentationLink link:calculationLink link:definitionLink 99931403 - Disclosure - ACQUISITIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 99940101 - Disclosure - BUSINESS AND ORGANIZATION (Details) link:presentationLink link:calculationLink link:definitionLink 99940301 - Disclosure - ACCOUNTING FOR PPP LOANS (Details) link:presentationLink link:calculationLink link:definitionLink 99940503 - Disclosure - SEGMENT INFORMATION - Segment property, plant and equipment, at cost, less accumulated depreciation (Details) link:presentationLink link:calculationLink link:definitionLink 99940601 - Disclosure - DISAGGREGATION OF REVENUE (Details) link:presentationLink link:calculationLink link:definitionLink 99940702 - Disclosure - CONTRACT BALANCES - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 99940801 - Disclosure - PERFORMANCE OBLIGATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 99941202 - Disclosure - INCOME TAXES - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 99941302 - Disclosure - SHORT-TERM AND LONG-TERM DEBT - Paycheck Protection Program Loans (Details) link:presentationLink link:calculationLink link:definitionLink 99941304 - Disclosure - SHORT-TERM AND LONG-TERM DEBT - Summary of short-term and long-term debt (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 99941502 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Intangible assets subject to amortization (Details) link:presentationLink link:calculationLink link:definitionLink 99941601 - Disclosure - LEASE OBLIGATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 99941602 - Disclosure - LEASE OBLIGATIONS - Operating lease-weighted average remaining term (Details) link:presentationLink link:calculationLink link:definitionLink 99941701 - Disclosure - SHARE-BASED COMPENSATION (Details) link:presentationLink link:calculationLink link:definitionLink 99941702 - Disclosure - SHARE-BASED COMPENSATION - Unvested restricted stock awards (Details) link:presentationLink link:calculationLink link:definitionLink 99941703 - Disclosure - SHARE-BASED COMPENSATION - unvested restricted stock awards and grant amounts that will vest in future periods (Details) link:presentationLink link:calculationLink link:definitionLink 99941704 - Disclosure - SHARE-BASED COMPENSATION - Unrecognized compensation expense for unvested restricted stock awards to be expensed in future periods (Details) link:presentationLink link:calculationLink link:definitionLink 99941801 - Disclosure - EQUITY RAISE (Details) link:presentationLink link:calculationLink link:definitionLink 99941901 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink 995200090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 995200105 - Statement - Consolidated Balance Sheets (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 995200405 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 995210101 - Disclosure - BUSINESS AND ORGANIZATION link:presentationLink link:calculationLink link:definitionLink 995210201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 995210301 - Disclosure - ACCOUNTING FOR PAYCHECK PROTECTION PROGRAM LOANS link:presentationLink link:calculationLink link:definitionLink 995210401 - Disclosure - REVENUE RECOGNITION link:presentationLink link:calculationLink link:definitionLink 995210501 - Disclosure - SEGMENT INFORMATION link:presentationLink link:calculationLink link:definitionLink 995210601 - Disclosure - DISAGGREGATION OF REVENUE link:presentationLink link:calculationLink link:definitionLink 995210701 - Disclosure - CONTRACT BALANCES link:presentationLink link:calculationLink link:definitionLink 995210801 - Disclosure - PERFORMANCE OBLIGATIONS link:presentationLink link:calculationLink link:definitionLink 995210901 - Disclosure - UNCOMPLETED CONTRACTS link:presentationLink link:calculationLink link:definitionLink 995211001 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 995211101 - Disclosure - EARNINGS PER SHARE link:presentationLink link:calculationLink link:definitionLink 995211201 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 995211301 - Disclosure - SHORT-TERM AND LONG-TERM DEBT link:presentationLink link:calculationLink link:definitionLink 995211401 - Disclosure - ACQUISITIONS link:presentationLink link:calculationLink link:definitionLink 995211501 - Disclosure - GOODWILL AND INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 995211601 - Disclosure - LEASE OBLIGATIONS link:presentationLink link:calculationLink link:definitionLink 995211701 - Disclosure - SHARE-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 995211801 - Disclosure - EQUITY RAISE link:presentationLink link:calculationLink link:definitionLink 995211901 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 99920102 - Disclosure - BUSINESS AND ORGANIZATION (Policies) link:presentationLink link:calculationLink link:definitionLink 99930503 - Disclosure - SEGMENT INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 99930603 - Disclosure - DISAGGREGATION OF REVENUE (Tables) link:presentationLink link:calculationLink link:definitionLink 99930703 - Disclosure - CONTRACT BALANCES (Tables) link:presentationLink link:calculationLink link:definitionLink 99930903 - Disclosure - UNCOMPLETED CONTRACTS (Tables) link:presentationLink link:calculationLink link:definitionLink 99931103 - Disclosure - EARNINGS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 99931203 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 99931303 - Disclosure - SHORT-TERM AND LONG-TERM DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 99931503 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 99931603 - Disclosure - LEASE OBLIGATIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 99931703 - Disclosure - SHARE-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 99940501 - Disclosure - SEGMENT INFORMATION - General (Details) link:presentationLink link:calculationLink link:definitionLink 99940701 - Disclosure - CONTRACT BALANCES - Accounts receivable-trade, net of allowance for doubtful accounts (Details) link:presentationLink link:calculationLink link:definitionLink 99941001 - Disclosure - FAIR VALUE MEASUREMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 99941101 - Disclosure - EARNINGS PER SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 99941501 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink