Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Revenue	$ 11,768	$ 11,148
Cost of sales	7,180	6,425
Gross profit	4,588	4,723
Operating expenses:
Engineering	1,552	1,304
Selling, general and administrative	3,469	3,707
Total operating expenses	5,021	5,011
Operating loss	(433)	(288)
Interest expense, net	(252)	(607)
Loss before income taxes	(685)	(895)
Provision for income taxes	2	42
Net loss	(687)	(937)
Deemed dividend on Series E shares	(94)	(106)
Cumulative dividends on Series E shares	(1,245)
Net loss attributable to common shareholders	$ (2,026)	$ (1,043)
Loss per common share – basic and diluted (in dollars per share)	$ (1.64)	$ (1.45)
Weighted average common shares used in per share calculation:
Basic and diluted (in shares)	1,232	718
Product [Member]
Revenue	$ 3,521	$ 2,123
Service [Member]
Revenue	$ 8,247	$ 9,025