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Stockholders' Equity - Stock-based Compensation Expense (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stock-based compensation expense
Total stock based compensation expense	$ 361,884	$ 266,325	$ 820,969	$ 615,226
Options vested, fair value			770,582	321,870
Research and Development Expense
Stock-based compensation expense
Total stock based compensation expense	104,259	104,153	251,212	300,291
Selling, general and administrative expense
Stock-based compensation expense
Total stock based compensation expense	257,625	162,172	569,757	314,935
Options to purchase Common Stock
Stock-based compensation expense
Unrecognized compensation cost	$ 2,388,077	$ 1,476,725	$ 2,388,077	$ 1,476,725
Weighted-average remaining vesting period for recognition			2 years 2 months 12 days	2 years 4 months 24 days
Options outstanding, weighted average contractual life			9 years 1 month 6 days

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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