Note 11 - Significant Customer and Industry Segment Information (Details Textual)	12 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 20, 2019
Number of Reportable Segments	2
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Number of Major Customers	3	2
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | U.S. Government and Defense-related Customers [Member]
Concentration Risk, Percentage	85.00%		98.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | First Customer [Member] | Microsource [Member]
Concentration Risk, Percentage	45.00%	57.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Second Customer [Member] | Microsource [Member]
Concentration Risk, Percentage	19.00%	26.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Third Customer [Member] | Gigatronics Division [Member]
Concentration Risk, Percentage	18.00%
Export Sales [Member]
Concentration Risk, Percentage	1.00%	1.00%