XML 36 R62.htm IDEA: XBRL DOCUMENT v3.19.3
Marketable Securities (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Payments to acquire investments $ 1,244,353 $ 3,200,554
Common Stock [Member]    
Payments to acquire investments 220,880 1,701,503
Gross unrealized gains (losses) (42,283) 133,067
Gross realized gains (losses)
Fair value $ 178,597 $ 1,834,570