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Derivatives and Fair Value Disclosures - Schedule of Derivative Instruments, Gain (Loss) (Detail) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Total loss on derivatives $ (50,976) $ (107,550)  
Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Total loss on derivatives (1,190,400) 67,424 $ (11,982)
Interest Rate Swap [Member] | Loss On Derivatives [Member] | Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Interest Rate Swap — Income (loss) Reclassification from OCI 60,954 84,966  
Interest Rate Swap — Change in Fair Value 7,186 (327,147)  
Interest Rate Swap — Realized income (119,116) 134,631  
Interest Rate Swap [Member] | Loss On Derivatives [Member] | Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Interest Rate Swap — Income (loss) Reclassification from OCI     $ (11,982)
Interest Rate Swap [Member] | Interest And Finance Costs [Member] | Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Interest Rate Swap — Income (loss) Reclassification from OCI $ (1,190,400) $ 67,424