Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Preferred Stock Including Additional Paid in Capital [Member]	Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Mar. 28, 2020	26,982	2,635,856
Balance at Mar. 28, 2020	$ 2,922	$ 31,952	$ (30,574)	$ 4,300
Net Income (Loss) Attributable to Parent, Total			(393)	(393)
Stock-based compensation		$ 354		354
Series E dividends			(14)	(14)
Net loss			(393)	(393)
Balance (in shares) at Mar. 27, 2021	26,982	2,635,856
Balance at Mar. 27, 2021	$ 2,922	$ 32,306	(30,981)	4,247
Net Income (Loss) Attributable to Parent, Total			(2,715)	(2,715)
Stock-based compensation		$ 579		579
Series E dividends			(53)	(53)
Net loss			(2,715)	(2,715)
Restricted stock granted (in shares)		38,020
Restricted stock forfeited (in shares)		(10,000)
Deemed dividend in connection with issuance of prefunded warrants			(203)	(203)
Prefunded warrants issuance		$ 1,608		$ 1,608
Issuance of common stock in connection with the exercise of options (in shares)		22,200		22,200
Issuance of common stock in connection with the exercise of options		$ 78		$ 78
Common stock issuance, net of offering costs (in shares)		46,154
Common stock issuance, net of offering costs		$ 141		141
Series E preferred stock converted to common (in shares)	(3,500)	35,000
Series E preferred stock converted to common	$ (87)	$ 130		43
Balance (in shares) at Mar. 26, 2022	23,482	2,767,230
Balance at Mar. 26, 2022	$ 2,835	$ 34,842	$ (33,952)	$ 3,725