Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Assets, Fair Value Disclosure	$ 133,593,168	$ 90,748,663
Mutual funds
Assets, Fair Value Disclosure	14,527,352	25,966,686
U.S. Treasury notes
Assets, Fair Value Disclosure	26,425,170	21,094,100
Money market mutual fund
Assets, Fair Value Disclosure	92,640,646	43,687,877
Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure	133,593,168	90,748,663
Fair Value, Inputs, Level 1 [Member] | Mutual funds
Assets, Fair Value Disclosure	14,527,352	25,966,686
Fair Value, Inputs, Level 1 [Member] | U.S. Treasury notes
Assets, Fair Value Disclosure	26,425,170	21,094,100
Fair Value, Inputs, Level 1 [Member] | Money market mutual fund
Assets, Fair Value Disclosure	92,640,646	43,687,877
Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | Mutual funds
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | U.S. Treasury notes
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | Money market mutual fund
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Mutual funds
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | U.S. Treasury notes
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Money market mutual fund
Assets, Fair Value Disclosure	$ 0	$ 0