Annual report pursuant to Section 13 and 15(d)

Commitments and contingencies - Schedule of Future Minimum Rental Payments for Operating Leases (Details)

v3.19.1
Commitments and contingencies - Schedule of Future Minimum Rental Payments for Operating Leases (Details)
Dec. 31, 2018
USD ($)
Future minimum lease payments under all non-cancelable operating leases  
2019 $ 643,930
2020 647,341
2021 589,538
2022 577,055
2023 584,803
Thereafter 134,700
Total $ 3,177,367