Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Additional Information (Details)

v3.19.1
Earnings Per Share - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Earnings Per Share [Abstract]    
Common stock dividends $ 1,995,327 $ 1,981,062
Common stock dividends per share $ 0.26 $ 0.26