Cash, Cash Equivalent, and Investments (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	$ 11,781,549		$ 11,781,549		$ 4,823,544
Short term investments, adjusted cost	20,053,019		20,053,019		29,399,146
Long term Investments, gross unrealized holding loss					0
Long term investments, adjusted cost	0		0		1,511,636
Cash and Investment, fair value	31,927,161		31,927,161		35,738,787
Investment, gross unrealized holding gain	96,852		96,852		22,452
Investment, gross unrealized holding losses	(4,259)		(4,259)		(17,991)
Cash and Investment, adjusted cost	31,834,568		31,834,568		35,734,326
Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	258,470		258,470		1,010,510
Money Market Funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	11,523,079		11,523,079		3,813,034
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity, premium paid on purchase	24,771	$ 23,308	221,156	$ 104,163	233,550
Corporate bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short term investments, fair value	20,145,612		20,145,612		29,387,053
Short term investments, gross unrealized holding gain	96,852		96,852		5,898
Short term investments, gross unrealized holding loss	(4,259)		(4,259)		(17,991)
Short term investments, adjusted cost	$ 20,053,019		$ 20,053,019		29,399,146
Long term Investments, fair value					1,528,190
Long term Investments, gross unrealized holding gain					16,554
Long term investments, adjusted cost					$ 1,511,636