Note 10 - Earnings Per Common Share - Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Jun. 30, 2018	Jul. 01, 2017
Net Loss		$ (8,755)	$ (842)
Deduct preferred stock dividends paid		6	6
Undistributed loss		(8,761)	(848)
Loss attributable to participating preferred		(34)	(6)
Loss Applicable to Common Stock		$ (8,727)	$ (842)
Weighted average common shares outstanding-basic (in shares)		9,744	9,814
Basic loss per common share (in dollars per share)		$ (0.90)	$ (0.09)
Loss attributable to common shareholders, diluted		$ (8,727)	$ (842)
Add dividends on convertible preferred stock
Additional shares issued related to the equity compensation plan (1) (in shares)	[1]
Additional shares to be issued under full conversion of preferred stock (1) (in shares)	[1]
Total shares for diluted (in shares)		9,744	9,814
Diluted Loss per Common Share (in dollars per share)		$ (0.90)	$ (0.09)

[1] Due to the equivalent stock units being dilutive and therefore, are not including in the Earnings Per Share calculation.