Annual report pursuant to Section 13 and 15(d)

Note 1 - Summary of Significant Accounting Policies - Weighted Average Common Shares Outstanding (Details)

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Note 1 - Summary of Significant Accounting Policies - Weighted Average Common Shares Outstanding (Details) - USD ($)
 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Net income $ 20,327,380 $ 7,293,066
Weighted average common shares (in shares) 13,720,699 13,643,355
Dilutive potential common shares (in shares) 63,594 0
Weighted average dilutive common shares outstanding (in shares) 13,784,293 13,643,355
Earnings per share:    
Basic (in dollars per share) $ 1.48 $ 0.53
Diluted (in dollars per share) $ 1.47 $ 0.53