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Note 1 - Overview and Summary of Significant Accounting Policies (Details Textual) shares in Thousands, $ in Thousands									3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 28, 2022 USD ($)	Feb. 21, 2022 USD ($)	Jan. 24, 2022 USD ($)	Jan. 19, 2022 USD ($)	Dec. 06, 2021 USD ($)	Oct. 01, 2021 USD ($)	Mar. 22, 2021 USD ($)	Mar. 01, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) shares	Sep. 30, 2021 USD ($) shares	Dec. 31, 2021 USD ($)
Number of Offices									225		225
Number of States in which Entity Operates									38		38
Entity Number of Employees									75,000		75,000
Accounts Receivable, Allowance for Credit Loss, Ending Balance									$ 27		$ 27		$ 26
Royalty Fees, Percentage of Payroll									4.50%		4.50%
Revenue, Percentage of Gross Margin									18.00%		18.00%
License Fee, Percentage of Gross Margin									9.00%		9.00%
Financing Receivable, Allowance for Credit Loss, Ending Balance									$ 405		$ 405		405
Impairment Reserve on Notes Receivable									1,600		1,600		1,500
Impairment of Intangible Assets (Excluding Goodwill), Total											$ 0		$ 0
Number of Reporting Units											1
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) \| shares											240	229
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay											4.00%
Defined Contribution Plan, Cost									$ 16	$ 14	$ 47	$ 41
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%
Minimum [Member]
Percentage of Sales for Services									6.00%		6.00%
Finite-Lived Intangible Asset, Useful Life (Year)											7 years
Minimum [Member] \| Franchise [Member]
Percentage of Sales for Services									5.00%		5.00%
Maximum [Member]
Percentage of Sales for Services									8.00%		8.00%
Finite-Lived Intangible Asset, Useful Life (Year)											15 years
Maximum [Member] \| Franchise [Member]
Percentage of Sales for Services									8.00%		8.00%
Link Staffing Acquisition [Member]
Significant Changes, Franchises Purchased During Period							35
Asset Acquisition, Consideration Transferred, Total							$ 11,123
License Fee, Percentage of Gross Margin							9.00%		9.00%		9.00%
Recruit Media [Member]
Asset Acquisition, Consideration Transferred, Total						$ 4,350
Asset Acqusition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liability						$ 1,076
Dental Power Staffing [Member]
Asset Acquisition, Consideration Transferred, Total					$ 1,862
Asset Acquisition, Consideration Transferred, Contingent Consideration					$ 382
Temporary Alternatives [Member]
Significant Changes, Franchises Purchased During Period			3
Business Combination, Consideration Transferred, Total			$ 7,043
Business Combination, Consideration Transferred, Liabilities Incurred			$ 336
Dubin [Member]
Business Combination, Consideration Transferred, Total		$ 2,462		$ 2,500
Business Combination, Consideration Transferred, Liabilities Incurred		362
Dubin [Member] \| Adjusted Net Working Capital Payable [Member]
Business Combination, Consideration Transferred, Liabilities Incurred		62
Dubin [Member] \| Notes Payable, Other Payables [Member]
Business Combination, Consideration Transferred, Liabilities Incurred		$ 300
Northbound [Member]
Business Combination, Consideration Transferred, Total	$ 11,428
Northbound [Member] \| Adjusted Net Working Capital Payable [Member]
Business Combination, Consideration Transferred, Liabilities Incurred	328
Northbound [Member] \| Notes Payable, Other Payables [Member]
Business Combination, Consideration Transferred, Liabilities Incurred	$ 1,500
Snelling Staffing Acquisition [Member]
Business Combination, Consideration Transferred, Total								$ 17,851