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Note 2 - Acquisitions - Pro Forma Information (Details) - Snelling Staffing Acquisition [Member] - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Royalty revenue $ 22,127,516 $ 15,626,612
Net income $ 8,697,596 $ 6,789,168
Basic earnings per share (in dollars per share) $ 0.65 $ 0.50
Basic weighted average shares outstanding (in shares) 13,482,303 13,542,403
Diluted earnings per share (in dollars per share) $ 0.64 $ 0.50
Diluted weighted average shares outstanding (in shares) 13,621,938 13,654,128