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Stock-Based Compensation Plans (Schedule of Share-Based Compensation Expense) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 1,046,516	$ 1,485,898	$ 1,364,698
Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	1,050,179	1,481,016	1,244,606
Nonemployee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	(3,663)	4,882	120,092
Employee, Nonemployee and Foundation Contribution
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 1,046,516	$ 1,485,898	$ 1,364,698

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Value, after forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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