Annual report pursuant to Section 13 and 15(d)

Nature of Operations and Summary of Significant Accounting Policies - Earnings (Loss) Per Common Share (Details)

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Nature of Operations and Summary of Significant Accounting Policies - Earnings (Loss) Per Common Share (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Product Information [Line Items]    
Net income $ 1,177,250 $ 6,575,770
Weighted average common shares outstanding - basic (in shares) 14,488,314 14,319,448
Effect of dilutive securities:    
Unvested restricted stock and stock options (in shares) 379,779 616,129
Weighted average common shares outstanding - diluted (in shares) 14,868,093 14,935,577
Basic earnings per share (in dollars per share) $ 0.08 $ 0.46
Diluted earnings per share (in dollars per share) $ 0.08 $ 0.44
Unvested restricted stock    
Effect of dilutive securities:    
Potentially dilutive securities excluded from calculation of diluted net income per common share (in shares) 0 58
Stock options    
Effect of dilutive securities:    
Potentially dilutive securities excluded from calculation of diluted net income per common share (in shares) 40,349 4,658