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, 2019
Dec. 31, 2018
Product Information [Line Items]    
Net income $ 3,323,712 $ 146,696
Weighted average common shares outstanding - basic (in shares) 13,819,149 13,669,107
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]    
Unvested restricted stock and stock options 648,418 362,610
Weighted average common shares outstanding - diluted (in shares) 14,467,567 14,031,717
Basic earnings per share (in dollars per share) $ 0.24 $ 0.01
Diluted earnings per share (in dollars per share) $ 0.23 $ 0.01
Restricted Stock    
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]    
Potentially dilutive securities excluded from calculation of diluted net income per common share (in shares) 0 6,896
Employee Stock Option    
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]    
Potentially dilutive securities excluded from calculation of diluted net income per common share (in shares) 39,286 236,205