6. INTANGIBLE ASSETS (Details)	12 Months Ended
	Dec. 31, 2018 USD ($)
Cost, beginning	$ 552,290
Cost, ending	552,290
Accumulated amortization, beginning	434,999
Amortization expense	65,025
Accumulated amortization, ending	500,024
Net carrying amount, beginning	117,291
Net carrying amount, ending	52,266
Patents
Cost, beginning	510,310
Cost, ending	510,310
Accumulated amortization, beginning	421,006
Amortization expense	51,032
Accumulated amortization, ending	472,038
Net carrying amount, beginning	89,304
Net carrying amount, ending	38,272
Software
Cost, beginning	41,980
Cost, ending	41,980
Accumulated amortization, beginning	13,993
Amortization expense	13,993
Accumulated amortization, ending	27,986
Net carrying amount, beginning	27,987
Net carrying amount, ending	$ 13,994