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Common Stock (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Schedule of Common Stock Activity The following table provides the activity in the Equity Shelf Program for the three-month and life-to-date periods ended December 31, 2020:
Three Months EndedLife-To-Date Ended
December 31, 2020
Gross proceeds$46,425,623 $253,551,490 
Less: agent commissions(464,256)(2,535,515)
Net proceeds$45,961,367 $251,015,975 
Number of shares sold691,081 3,396,457
Weighted average price per share$67.18 $74.65