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Derivatives and Fair Value Disclosures - Schedule of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance $ (2,259,043)    
Reclassification adjustment 60,954 $ 84,966  
Ending balance (4,952,823) (2,259,043)  
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (2,259,043) 673,979 $ 617,895
Effective portion of changes in fair value of interest swap contracts (2,632,826) (2,848,056) 56,084
Reclassification adjustment (60,954) (84,966)  
Ending balance $ (4,952,823) $ (2,259,043) $ 673,979