Annual report pursuant to Section 13 and 15(d)

Payment of Dividends (Details)

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Payment of Dividends (Details) - USD ($)
12 Months Ended
Nov. 06, 2017
Dec. 08, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Payments of Dividends [Abstract]          
Dividends paid (in dollars per share) $ 0.13 $ 0.30 $ 0.13 $ 0.30 $ 0.30
Total outlay for dividends $ 1,148,513 $ 2,617,513   $ 0