Note 12 - Loss Per Common Share - Shares Excluded from the Diluted EPS Calculation (Details) - shares shares in Thousands	12 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Anti-dilutive securities excluded from computation of earning per share (in shares)	598	1,214
Share-based Payment Arrangement, Option [Member]
Anti-dilutive securities excluded from computation of earning per share (in shares)	241	182
Restricted Stock [Member]
Anti-dilutive securities excluded from computation of earning per share (in shares)	20	22
Convertible Debt Securities [Member]
Anti-dilutive securities excluded from computation of earning per share (in shares)	180	780
Warrant [Member]
Anti-dilutive securities excluded from computation of earning per share (in shares)	157	230