Note 5 - Intangible Assets - Intangible Assets (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Cost	$ 3,270,456	$ 3,270,456
Accumulated amortization	1,158,485	1,019,467
Net book value	2,111,971	2,250,989
Ad Tech Technology [Member]
Cost	1,877,415	1,877,415
Accumulated amortization	782,256	688,386
Net book value	1,095,159	1,189,029
Kidoz OS Technology [Member]
Cost	31,006	31,006
Accumulated amortization	21,532	18,948
Net book value	9,474	12,058
Customer Relationships [Member]
Cost	1,362,035	1,362,035
Accumulated amortization	354,697	312,133
Net book value	$ 1,007,338	$ 1,049,902