Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
Revenue	$ 2,882,000	$ 2,196,000	$ 5,122,000	$ 4,354,000
Cost of revenue	1,416,000	1,192,000	2,512,000	2,235,000
Gross profit	1,466,000	1,004,000	2,610,000	2,119,000
Operating expenses:
Research and development	1,652,000	2,200,000	3,539,000	4,019,000
Selling, general and administrative	1,794,000	1,665,000	3,741,000	3,544,000
Restructuring costs	0	34,000	0	513,000
Total operating expenses	3,446,000	3,899,000	7,280,000	8,076,000
Loss from operations	(1,980,000)	(2,895,000)	(4,670,000)	(5,957,000)
Interest expense	(32,000)	(183,000)	(64,000)	(263,000)
Gain on forgiveness of debt	0	0	1,192,000	0
Interest income and other income (expense), net	(45,000)	72,000	(52,000)	67,000
Loss before income taxes	(2,057,000)	(3,006,000)	(3,594,000)	(6,153,000)
Provision for (benefit from) income taxes	5,000	(27,000)	157,000	(9,000)
Net loss	$ (2,062,000)	$ (2,979,000)	$ (3,751,000)	$ (6,144,000)
Net loss per share:
Basic and diluted (in dollars per share)	$ (0.18)	$ (0.35)	$ (0.33)	$ (0.73)
Weighted average shares outstanding:
Basic and diluted (in shares)	11,485	8,560	11,374	8,461