Cash, Cash Equivalent, and Investments (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	$ 4,696,831		$ 4,823,544
Short term investments, adjusted cost	26,587,752		29,399,146
Long term investments, adjusted cost	2,518,160		1,511,636
Cash and Investment, fair value	33,673,423		35,738,787
Investment, gross unrealized holding gain	24,812		22,452
Investment, gross unrealized holding losses	(154,132)		(17,991)
Cash and Investment, adjusted cost	33,802,743		35,734,326
Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	523,626		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	4,173,205		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	196,385	$ 80,855	233,550
Corporate bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short term investments, fair value	26,439,982		29,387,053
Short term investments, gross unrealized holding gain			5,898
Short term investments, gross unrealized holding loss	(147,770)		(17,991)
Short term investments, adjusted cost	26,587,752		29,399,146
Long term Investments, fair value	2,536,610		1,528,190
Long term Investments, gross unrealized holding gain	24,812		16,554
Long term Investments, gross unrealized holding loss	(6,362)
Long term investments, adjusted cost	$ 2,518,160		$ 1,511,636