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Stock Incentive Plans (Tables)
 9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Non-Cash Compensation Expense for Stock Awards and Options Included in G&A Stock-based compensation expense for all stock awards and options included in General and administrative expenses:
Three Months EndedNine Months Ended
September 30, 2021September 30, 2020September 30, 2021September 30, 2020
Stock awards/Stock Option Plans$777,468 $741,021 $2,235,279 $2,300,444