• Filing Date: 2019-07-11
  • Form Type: 10-K
  • Description: Annual report
v3.19.2
Schedule of Product Warranty Liability (Details) - USD ($)
Apr. 30, 2019
Apr. 30, 2018
Balance, beginning of year $ 63,130 $ 54,365
Usage during the year 0 0
Additions (reductions) during the year (11,095) 8,765
Balance, end of year $ 52,035 $ 63,130