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Income Taxes (Operating Loss Carryforwards, Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 19,196,121	$ 18,511,161
Valuation allowance for deferred tax assets:
Operating Loss Carryforwards [Line Items]
Charged to costs and expenses	684,960	1,129,109	$ 1,749,817
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 56,484,494
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		$ 59,939,781