XML 34 R22.htm IDEA: XBRL DOCUMENT v3.19.2
3. PATENTS (Tables)
12 Months Ended
Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of patents
   March 31, 2019   March 31, 2018 
Patents  $211,645   $211,645 
Accumulated amortization   (144,977)   (135,813)
   $66,668   $75,832