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Note 14 - Unaudited Quarterly Results of Operations - Quarterly Results (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Revenue $ 6,769,099 $ 3,405,475 $ 22,759,793 $ 13,809,125
Cost of staffing revenue, owned locations (170,548) 0 (170,548) 0
Gross profit 6,598,551 3,405,475 22,589,245 13,809,125
Selling, general and administrative expenses 4,437,206 2,158,276 13,363,957 8,700,446
Depreciation and amortization 498,226 32,528 1,563,088 129,182
Income from operations 1,663,119 1,214,671 7,662,200 4,979,497
Other miscellaneous income 850,979 238,365 4,570,575 458,973
Interest income 127,480 161,014 412,457 711,646
Interest and other financing expense (217,854) (171,504) (157,234) (49,664)
Net income before income taxes 2,423,724 1,442,546 12,487,998 6,100,452
Provision for income taxes 229,836 86,446 638,064 741,038
Net Income (loss) $ 2,193,888 $ 1,356,100 $ 11,849,934 $ 5,359,414
Basic (in dollars per share) $ 0.16 $ 0.10 $ 0.88 $ 0.40
Diluted (in dollars per share) $ 0.16 $ 0.10 $ 0.87 $ 0.39
Basic (in shares) 13,513,960 13,589,006 13,493,715 13,542,403
Diluted (in shares) 13,634,995 13,731,644 13,605,667 13,654,128
Royalty [Member]        
Revenue $ 6,067,378 $ 3,229,658 $ 21,317,045 $ 12,792,793
Staffing, Owned Locations [Member]        
Revenue 230,668 0 230,668 0
Service [Member]        
Revenue $ 471,053 $ 175,817 $ 1,212,080 $ 1,016,332