Quarterly report pursuant to Section 13 or 15(d)

Prepayment from Customer (Details)

v3.21.2
Prepayment from Customer (Details) - USD ($)
6 Months Ended 12 Months Ended
Mar. 09, 2015
Jun. 30, 2021
Dec. 31, 2020
Prepayment From Customer [Abstract]      
Purchase price of equipment $ 909,000 $ 762,000 $ 762,000
Equipment purchase price prepayment   $ 1,611,357