Note 10 - Major Customers and Export Sales - Foreign Revenue (Details)	3 Months Ended		6 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Mar. 27, 2021	Mar. 28, 2020
EGYPT
Foreign revenue by country	83.00%		24.00%
Mid-East and Africa [Member]
Foreign revenue by geographical area	83.00%	100.00%	95.00%	100.00%
PHILIPPINES
Foreign revenue by country	17.00%		5.00%
Far East [Member]
Foreign revenue by geographical area	17.00%		5.00%
MOROCCO
Foreign revenue by country			63.00%
SAUDI ARABIA
Foreign revenue by country		99.00%	8.00%	99.00%
BAHRAIN
Foreign revenue by country		1.00%		1.00%