Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Jan. 01, 2023	Jan. 02, 2022	Jan. 03, 2021
Revenue		$ 16,180	$ 12,685	$ 8,634
Cost of revenue		7,378	5,266	4,386
Gross profit		8,802	7,419	4,248
Operating expenses:
Research and development		5,001	6,927	7,544
Selling, general and administrative		7,601	8,008	6,820
Restructuring costs		0	0	753
Loss from operations		(3,800)	(7,516)	(10,869)
Interest expense		(148)	(130)	(328)
Gain on forgiveness of PPP Loan		0	1,192	0
Interest income and other (expense) income, net		(221)	(43)	97
Loss before income taxes		(4,169)	(6,497)	(11,100)
Provision for income taxes		98	119	51
Net loss		$ (4,267)	$ (6,616)	$ (11,151)
Net loss per share: (1)
Basic and diluted (in dollars per share)	[1]	$ (0.34)	$ (0.57)	$ (1.14)
Weighted average shares: (1)
Basic and diluted (in shares)		12,588	11,535	9,781

[1] Net loss equals comprehensive loss for all periods presented.