Annual report pursuant to Section 13 and 15(d)

Leases - Lease costs (Details)

v3.21.1
Leases - Lease costs (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases    
Operating lease expense $ 167,729 $ 104,794
Short-term lease expense 66,025 38,414
Total lease cost $ 233,754 $ 143,208