Quarterly report pursuant to Section 13 or 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 ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Net income $ 814,947 $ 952,644
Weighted average common shares outstanding - basic (in shares) 13,890,673 13,751,196
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]    
Unvested restricted stock and stock options (in shares) 592,911 504,810
Weighted average common shares outstanding - diluted (in shares) 14,483,584 14,256,006
Basic earnings per share (in dollars per share) $ 0.06 $ 0.07
Diluted earnings per share (in dollars per share) $ 0.06 $ 0.07
Unvested restricted stock    
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]    
Weighted average potentially dilutive securities (in shares) 0 3,339
Stock options    
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]    
Weighted average potentially dilutive securities (in shares) 101,692 69,675