Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Operating activities:
Net loss	$ (7,547)	$ (5,225)
Adjustments to reconcile net loss to net cash used in operating activities:
Gain on PPP loan forgiveness	0	(2,497)
Depreciation and amortization	485	803
Amortization of operating lease right-of-use assets	899	905
Loss on disposal of property and equipment	0	3
Stock-based compensation	1,621	1,628
Provision for doubtful accounts	187	37
Changes in operating assets and liabilities:
Accounts receivable	196	639
Receivable from related party	(433)	(3,106)
Inventories	(3,019)	268
Prepaid expenses and other current assets	(397)	(341)
Other long-term assets	(1,185)	(143)
Accounts payable	1,086	1,625
Payable to related party	(612)	627
Accrued compensation	(744)	1,228
Accrued expenses	(25)	588
Accrued warranty	116	(89)
Deferred revenue	868	12,058
Operating lease liabilities	(886)	(1,076)
Other long-term liabilities	(129)	285
Net cash (used in) provided by operating activities	(9,519)	8,217
Investing activities:
Acquisition of property and equipment	(286)	(213)
Cash paid for business combination, net	0	(5,343)
Net cash used in investing activities	(286)	(5,556)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	0	9,878
Proceeds for stock option exercise	21	217
Taxes paid related to net share settlements of equity awards	(94)	(629)
Net cash provided by financing activities	(73)	9,466
Effect of foreign exchange rate changes	(52)	99
Net (decrease) increase in cash and cash equivalents	(9,930)	12,226
Cash and cash equivalents, beginning of year	23,852	11,626
Cash and cash equivalents, end of year	13,922	23,852
Supplemental disclosure of cash flow information:
Cash paid during the year for income taxes	73	15
Supplemental disclosure of non-cash activities:
Transfer of inventory to property and equipment	5	118
ROU assets obtained with the modification of operating lease	$ 0	$ 2,042