Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Original maturities of deferred revenue (Details)

v3.21.1
Commitments and Contingencies - Original maturities of deferred revenue (Details) - Deferred Lease Revenue [Member]
Dec. 31, 2020
USD ($)
Other Commitments [Line Items]  
2021 $ 1,679,813
2022 394,925
2023 24,593
Total $ 2,099,331