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Noncurrent Total stockholders' equity Beginning balance Ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Right-of-use assets acquired under operating lease Right-of-Use Asset Obtained in Exchange for Operating Lease Liability ORGANIZATION AND BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] STOCKHOLDERS' EQUITY Shareholders' Equity and Share-based Payments [Text Block] 2021 Finite-Lived Intangible Asset, Expected Amortization, Year One Revenue from services Revenues Income tax expense (benefit) Income Tax Expense (Benefit) Acquisition and integration-related costs Acquisition And Integration-Related Costs Acquisition and integration-related costs include costs for prior acquisitions, costs incurred for potential transactions, and accretion and valuation adjustments on contingent consideration liabilities Borrowing base, percentage of assets Line Of Credit, Borrowing Base, Percentage Of Assets Line Of Credit, Borrowing Base, Percentage Of Assets Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Income tax effect related to unrealized loss on interest rate contracts Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Restructuring Costs Costs Associated with Exit or Disposal Activities or Restructurings, Policy [Policy Text Block] Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Convertible Note Derivative Liability Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Non-compete agreements Noncompete Agreements [Member] Prepaid expenses and other assets Increase (Decrease) in Other Operating Assets Term Loan Term Loan [Member] Term Loan [Member] Deferred income tax (benefit) expense Deferred Income Tax Expense (Benefit) Income tax effect related to reclassification adjustment to statement of operations Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Award Type [Axis] Award Type [Axis] Fair Value Assets Measures on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Valuation Allowance [Line Items] Valuation Allowance [Line Items] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Maximum Maximum [Member] Security Exchange Name Security Exchange Name Noncontrolling Interest in Subsidiary Noncontrolling Interest [Member] Taxes on other comprehensive income (loss): Other Comprehensive Income (Loss), Tax1 [Abstract] Other Comprehensive Income (Loss), Tax1 [Abstract] (Accumulated Deficit) Retained Earnings Retained Earnings [Member] Measurement Basis [Axis] Measurement Basis [Axis] Payment for contingent liability Payment for Contingent Consideration Liability, Financing Activities Effective tax rate Effective Income Tax Rate Reconciliation, Percent 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] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Balance, beginning Balance, ending Accounts Receivable, Allowance for Credit Loss Award Type [Domain] Award Type [Domain] Document Transition Report Document Transition Report Accounts payable and accrued expenses Accounts Payable and Other Accrued Liabilities, Current Revenue from related parties Revenue from Related Parties Lease and related assets impairment Operating Lease And Related Long-Lived Assets Held-For-Use, Impairment Charges Operating Lease And Related Long-Lived Assets Held-For-Use, Impairment Charges Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Notes payable, current Notes Payable, Current Disposal Group Classification [Domain] Disposal Group Classification [Domain] Quarterly commitment fee on the average daily unused portion (percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage EARNINGS PER SHARE Earnings Per Share [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Current liabilities: Liabilities, Current [Abstract] Recently Adopted Accounting Pronouncement New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract]