Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021
Operating activities:
Net loss	$ (6,399)	$ (2,782)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Gain on Paycheck Protection Program (PPP) loan forgiveness	0	(2,497)
Depreciation and amortization	339	587
Stock-based compensation	1,105	1,263
Provision for doubtful accounts	187	0
Changes in operating assets and liabilities:
Accounts receivable	259	778
Receivable from related party	(481)	(2,018)
Inventories	(3,214)	(907)
Prepaid expenses and other current assets	(913)	(295)
Operating lease right-of-use assets	702	676
Other long-term assets	(1,018)	73
Accounts payable	1,770	1,547
Payable to related party	(526)	514
Accrued compensation	(328)	719
Accrued expenses	132	563
Accrued warranty	75	(88)
Deferred revenue	1,318	11,222
Operating lease liabilities	(682)	(840)
Other liabilities	(255)	1,440
Net cash (used in) provided by operating activities	(7,929)	9,955
Investing activities:
Acquisition of property and equipment	(203)	(176)
Cash paid for business combination, net	0	(5,343)
Net cash used in investing activities	(203)	(5,519)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	0	9,878
Proceeds from stock option exercises	21	175
Taxes paid related to net share settlements of equity awards	(94)	(626)
Net cash (used in) provided by financing activities	(73)	9,427
Effect of foreign exchange rate changes	209	79
Net (decrease) increase in cash and cash equivalents	(7,996)	13,942
Cash and cash equivalents, beginning of period	23,852	11,626
Cash and cash equivalents, end of period	15,856	25,568
Supplemental disclosure of cash flow information:
Cash paid during the period for income taxes	81	23
Supplemental disclosure of non-cash activities:
Transfer of inventory to property and equipment	0	123
ROU assets obtained with the modification of operating lease	$ 0	$ 2,042