Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 28, 2021	Dec. 27, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 28, 2021	Mar. 29, 2020	Mar. 31, 2019
Earnings per share from continuing operations - Basic:
Net earnings									$ (14,373)	$ (15,601)	$ (8,882)
Weighted average common shares outstanding - Basic (in shares)	8,814,859	8,699,937	8,656,877	8,617,803	8,554,348	8,541,020	8,650,320	8,494,168	8,697,369	8,526,965	8,436,796
Earnings per common share from continuing operations - Basic (in dollars per share)									$ (1.65)	$ (1.83)	$ (1.05)
Diluted (loss) income per share
Net earnings									$ (14,373)	$ (15,601)	$ (8,882)
Weighted average common shares outstanding - Basic (in shares)	8,814,859	8,699,937	8,656,877	8,617,803	8,554,348	8,541,020	8,650,320	8,494,168	8,697,369	8,526,965	8,436,796
Weighted average common shares outstanding - Diluted (in shares)									8,697,000	8,527,000	8,437,000
Loss per common share from continuing operations - Diluted (in dollars per share)									$ (1.65)	$ (1.83)	$ (1.05)
Consolidated operations (in dollars per share)									$ (1.01)	$ (2.53)	$ 0.65
Anti-dilutive equity awards (in shares)									755,000	852,000	94,000
Options outstanding (in shares)	924,958								924,958
Stock Options
Diluted (loss) income per share
Anti-dilutive equity awards (in shares)									755,000	852,000	94,000
Options outstanding (in shares)	925,000				862,000				925,000	862,000	591,500
Performance Stock Units
Diluted (loss) income per share
Anti-dilutive equity awards (in shares)									0	0	0
RSUs
Diluted (loss) income per share
Anti-dilutive equity awards (in shares)									0	0	0