Quarterly report pursuant to Section 13 or 15(d)

INVENTORIES - Additional Information (Details)

v3.20.2
INVENTORIES - Additional Information (Details) - USD ($)
3 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Cost of Sales $ 62,555 $ 336,085
Warranty adjustment 0 26,911
Inventory Cost [Member]    
Cost of Sales 143,810 $ 299,795
Warranty adjustment $ 81,224