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Stock-Based Compensation Plans (Schedule of Share-Based Compensation Expense) (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation $ 852,102 $ 622,503 $ 760,894
Employee      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation 833,027 456,749 660,963
Nonemployee      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation $ 19,075 $ 165,754 $ 99,931