Quarterly report pursuant to Section 13 or 15(d)

Warranty provision (Details)

v3.20.4
Warranty provision (Details) - USD ($)
3 Months Ended 9 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Warranty Provision [Abstract]        
Non-cash warranty provision $ 160,125 $ 1,356,422 $ 1,407,420 $ 2,711,213