Note 12 - Earnings per Common Share - Earnings per Common Share from Continuing Operations and Discontinued Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Net Earnings (Loss) From Continuing Operations	$ 1,103	$ (2,160)
Deduct preferred stock dividends paid	6	6
Undistributed earnings (loss) from continuing operations	1,097	(2,166)
Earnings (loss) from continuing operations attributable to participating preferred	4	(8)
Earnings (loss) from continuing operations attributable to common shareholders	$ 1,093	$ (2,158)
Weighted average common shares outstanding-basic (in shares)	9,477	9,744
Continuing Operations (in dollars per share)	$ 0.12	$ (0.22)
Earnings (loss) from continuing operations attributable to common shareholders	$ 1,093	$ (2,158)
Add dividends on convertible preferred stock	5
Earnings (loss) from continuing operations attributable to common stock on a diluted basis	$ 1,098	$ (2,158)
Weighted average common shares outstanding-basic (in shares)	9,477	9,744
Additional shares issued related to the equity compensation plan (in shares)	2
Additional shares to be issued under full conversion of preferred stock (in shares)	67
Total shares for diluted (in shares)	9,546	9,744
Diluted earnings (loss) per common share from continuing operations (in dollars per share)	$ 0.12	$ (0.22)
Loss from discontinued operations		$ (6,595)
Deduct preferred stock dividends paid		6
Undistributed loss from continuing operations		(6,601)
Loss from continuing operations attributable to participating preferred		(26)
Loss from continuing operations attributable to common shareholders		$ (6,575)
Discontinued Operations (in dollars per share)		$ (0.67)
Loss from continuing operations attributable to common shareholders		$ (6,575)
Add dividends on convertible preferred stock
Loss from continuing operations attributable to common stock on a diluted basis		$ (6,575)
Diluted loss per common share from continuing operations (in dollars per share)		$ (0.67)