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Note 1 - Overview and Summary of Significant Accounting Policies (Details Textual) |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 06, 2021 USD ($) | Oct. 01, 2021 USD ($) | Mar. 22, 2021 USD ($) | Mar. 01, 2021 USD ($) | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares | Dec. 01, 2021 USD ($)
Number of Offices |  |  |  |  | 217 |  |
Number of States in which Entity Operates |  |  |  |  | 36 |  |
Entity Number of Employees |  |  |  |  | 73,000 |  |
Royalty Fees, Percentage of Payroll |  |  |  |  | 4.50% |  |
Revenue, Percentage of Gross Margin |  |  |  |  | 18.00% |  |
License Fee, Percentage of Gross Margin |  |  |  |  | 9.00% |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance |  |  |  |  | $ 1,900,000 | $ 1,600,000 |
Debt Issuance Costs, Noncurrent, Net, Total |  |  |  |  |  | 0 | $ 430,000
Impairment of Intangible Assets (Excluding Goodwill), Total |  |  |  |  | $ 0 | $ 0 |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares |  |  |  |  | 209,000 | 308,000 |
Accounts Receivable, Allowance for Credit Loss, Ending Balance |  |  |  |  | $ 26,000 | $ 77,000 |
Marketing and Advertising Expense, Total |  |  |  |  | $ 94,000 | 33,000 |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay |  |  |  |  | 4.00% |  |
Defined Contribution Plan, Cost |  |  |  |  | $ 55,000 | $ 23,000 |
First Three Percent [Member] |  |  |  |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match |  |  |  |  | 100.00% |  |
Beyond Three Percent [Member] |  |  |  |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match |  |  |  |  | 50.00% |  |
Building [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Estimated Useful Lives |  |  |  |  | 40 |  |
Building Improvements [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Estimated Useful Lives |  |  |  |  | 15 |  |
Minimum [Member] |  |  |  |  |  |  |
Percentage of Sales for Services |  |  |  |  | 6.00% |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  |  |  | 7 years |  |
Accounts Receivable Age Dates (Day) |  |  |  |  | 42 days |  |
Minimum [Member] | Equipment [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Estimated Useful Lives |  |  |  |  | 5 |  |
Minimum [Member] | Franchise [Member] |  |  |  |  |  |  |
Percentage of Sales for Services |  |  |  |  | 5.00% |  |
Maximum [Member] |  |  |  |  |  |  |
Percentage of Sales for Services |  |  |  |  | 8.00% |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  |  |  | 15 years |  |
Accounts Receivable Age Dates (Day) |  |  |  |  | 84 days |  |
Maximum [Member] | Equipment [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Estimated Useful Lives |  |  |  |  | 7 |  |
Maximum [Member] | Franchise [Member] |  |  |  |  |  |  |
Percentage of Sales for Services |  |  |  |  | 8.00% |  |
Link Staffing Acquisition [Member] |  |  |  |  |  |  |
Asset Acquisition, Consideration Transferred, Total |  |  | $ 11,122,911 |  |  |  |
License Fee, Percentage of Gross Margin |  |  | 9.00% |  |  |  |
Recruit Media [Member] |  |  |  |  |  |  |
Asset Acquisition, Consideration Transferred, Total |  | $ 4,350,000 |  |  |  |  |
Dental Power Staffing [Member] |  |  |  |  |  |  |
Asset Acquisition, Consideration Transferred, Total | $ 1,862,029 |  |  |  |  |  |
Snelling Staffing Acquisition [Member] |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  | $ 17,850,627 |  |  |

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