Note 17 - Segment and Geographic Information - Major Distributors of Net Account Receivables (Details) - Accounts Receivable [Member] - Customer Concentration Risk [Member]		9 Months Ended		12 Months Ended
		Jan. 01, 2017		Mar. 27, 2016
Distributor A [Member]
Net accounts receivable	[1]	28.00%		17.00%
Distributor B [Member]
Net accounts receivable		17.00%		13.00%
Distributor C [Member]
Net accounts receivable		15.00%		14.00%
Distributor D [Member]
Net accounts receivable	[2]			14.00%
Customer A [Member]
Net accounts receivable			[2]	12.00%

[1] Related Party

[2] Accounts receivable for this customer for this period were less than 10% of total account balance.