Note 5 - Revenue: Schedule of Revenue by source (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Domestic customer A
Sales to customers in excess of 10 percent	76,947	28,384	133,118	57,702
Customers in excess of 10 percent, portion of total sales	17.00%	12.00%	15.00%	11.00%
Domestic customer B
Sales to customers in excess of 10 percent	64,968	27,802	129,798
Customers in excess of 10 percent, portion of total sales	14.00%	11.00%	15.00%
Domestic customer D
Sales to customers in excess of 10 percent	62,080	24,473
Customers in excess of 10 percent, portion of total sales	14.00%	10.00%