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Note 1 - Overview and Summary of Significant Accounting Policies (Details Textual)
shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Feb. 28, 2022
USD ($)
Jan. 24, 2022
USD ($)
Jan. 10, 2022
USD ($)
Dec. 06, 2021
USD ($)
Oct. 01, 2021
USD ($)
Mar. 22, 2021
USD ($)
Mar. 01, 2021
USD ($)
Mar. 31, 2022
USD ($)
shares
Mar. 31, 2021
USD ($)
shares
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Number of Offices               224      
Number of States in which Entity Operates               38      
Entity Number of Employees               75,000      
Accounts Receivable, Allowance for Credit Loss, Ending Balance               $ 24   $ 26  
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 $ 1,900 $ 1,900  
Impairment of Intangible Assets (Excluding Goodwill), Total               $ 0     $ 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares               267 293    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay                   4.00%  
Defined Contribution Plan, Cost               $ 13 $ 11    
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%      
Finite-Lived Intangible Asset, Useful Life (Year)               7 years      
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      
Maximum [Member] | Franchise [Member]                      
Percentage of Sales for Services               8.00%      
Snelling Staffing Acquisition [Member]                      
Business Combination, Consideration Transferred, Total             $ 17,851        
Temporary Alternatives [Member]                      
Significant Changes, Franchises Purchased During Period   3 3                
Payments to Acquire Productive Assets, Total   $ 5,250 $ 5,250                
Dubin [Member]                      
Payments to Acquire Productive Assets, Total     2,400                
Northbound [Member]                      
Payments to Acquire Productive Assets, Total $ 11,000   $ 11,000                
Link Staffing Acquisition [Member]                      
Significant Changes, Franchises Purchased During Period           35          
Payments to Acquire Productive Assets, Total           $ 11,123          
Asset Acquisition, Consideration Transferred, Total           $ 11,123          
License Fee, Percentage of Gross Margin           9.00%          
Recruit Media [Member]                      
Payments to Acquire Productive Assets, Total         $ 3,283 $ 11,100          
Asset Acquisition, Consideration Transferred, Total         $ 4,350            
Dental Power Staffing [Member]                      
Payments to Acquire Productive Assets, Total       $ 1,480              
Asset Acquisition, Consideration Transferred, Total       $ 1,862