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January 1, 2021 Balance - March 31, 2021 Contract with Customer, Liability Other assets Increase (Decrease) in Other Operating Assets Entity Emerging Growth Company Entity Emerging Growth Company Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Deferred income taxes Deferred Income Tax Expense (Benefit) Fair market value of transaction, aggregate Fair Market Value of Aggregate Transactions, Approval Threshold Under EBITDA Non-Compliance Fair Market Value of Aggregate Transactions, Approval Threshold Under EBITDA Non-Compliance Borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Award Type [Axis] Award Type [Axis] Leases, non-current Lease, Liability, Noncurrent Lease, Liability, Noncurrent Maximum Maximum [Member] Amortization of debt issuance costs Amortization of Debt Issuance Costs Federal Funds Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] 2022 Purchase Obligation, to be Paid, Year One Accumulated deficit Retained Earnings [Member] Demand registration, minimum percentage of shares Equity Agreement, Demand Registration, Minimum Percentage Of Shares Equity Agreement, Demand Registration, Minimum Percentage Of Shares Number of complaints filed Loss Contingency, New Claims Filed, Number Effective tax rate Effective Income Tax Rate Reconciliation, Percent Summary of assets and liabilities held by the Company and their related classifications under the fair value hierarchy Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Additional disclosures related to stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Pending Litigation Pending Litigation [Member] Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Equity Award [Domain] Award Type [Domain] Professional Services Professional Services [Member] Professional Services [Member] Trading Symbol Trading Symbol Exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Litigation Status [Domain] Litigation Status [Domain] Treasury stock, at cost (7,162 and 7,162 shares at March 31, 2021 and December 31, 2020, respectively) Treasury Stock, Value Contract asset, balance Contract with Customer, Asset, after Allowance for Credit Loss Earnings per Common Share (EPS) Earnings Per Share [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Redeemable noncontrolling interest Redeemable Noncontrolling Interest, Equity, Carrying Amount Current liabilities: Liabilities, Current [Abstract] Financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Entity Shell Company Entity Shell Company Shares withheld for taxes in connection with issuance of restricted stock (in shares) Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Preferred stock, redemption period Preferred Stock, Redemption Period Preferred Stock, Redemption Period Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Borrowings on revolving line of credit Proceeds from Lines of Credit Statement of Financial Position [Abstract] Statement of Financial Position [Abstract]