Annual report pursuant to Section 13 and 15(d)

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

v3.20.1
Commitments and Contingencies - Original maturities of deferred revenue (Details) - Deferred Lease Revenue [Member]
Dec. 31, 2019
USD ($)
Other Commitments [Line Items]  
2020 $ 1,008,122
2021 150,437
2022 47,181
Total $ 1,205,740