Note 3 - Revenue Recognition - Segment Revenue Disaggregated by Product Category Groups (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Net sales		$ 370,002	$ 320,660	$ 634,927	$ 564,753
Canned Vegetables [Member]
Net sales		227,000	209,700	405,900	371,600
B&G Foods, Inc [Member]
Net sales	[1]	61,800	31,700	68,900	39,000
Frozen [Member]
Net sales		25,000	29,700	44,500	57,800
Fruit [Member]
Net sales		26,900	22,300	49,500	43,500
Chip Products [Member]
Net sales		3,100	3,200	6,000	5,200
Prepared Foods [Member]
Net sales		23,600	19,900	53,400	37,300
Manufactured Product, Other [Member]
Net sales		$ 2,600	$ 4,200	$ 6,700	$ 10,400

[1] B&G includes canned and frozen vegetable sales exclusively for B&G.