Note 13 - Right-of-use Assets - Right-of-use Assets (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Operating lease right-of-use assets			$ 134,914
Initial recognition of operating lease right-of-use assets					76,557
Capitalization of operating lease right-of-use assets					125,474
Amortization of operating lease right-of use assets	$ (15,734)	$ (20,972)	(44,695)	$ (58,475)	(72,416)
Operating lease right-of-use assets	$ 107,318		107,318		134,914
Facility in Vancouver, Canada [Member]
Capitalization of operating lease right-of-use assets					125,474
Operating Lease, License Agreement [Member]
Capitalization of operating lease right-of-use assets			$ 17,099		$ 5,299