Quarterly report pursuant to Section 13 or 15(d)

Short-Term Investments (Schedule of Short-Term Investments) (Details)

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Short-Term Investments (Schedule of Short-Term Investments) (Details) - Mutual Fund [Member] - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Estimated Fair Value $ 5,611,538 $ 5,570,027
Gross Unrealized Gains 5,457  
Gross Unrealized Losses   (131)
Amortized Cost $ 5,606,081 $ 5,570,158