Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021
Operating activities:
Net loss	$ (4,632)	$ (617)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Gain on PPP loan forgiveness	0	(2,497)
Depreciation and amortization	228	365
Stock-based compensation	728	646
Changes in operating assets and liabilities:
Accounts receivable	(211)	66
Receivable from related party	677	(1,378)
Inventories	(2,590)	(22)
Prepaid expenses and other current assets	(994)	(181)
Operating lease right-of-use assets	467	431
Other long-term assets	(329)	75
Accounts payable	1,042	1,062
Payable to related party	(447)	39
Accrued compensation	(889)	103
Accrued expenses	127	464
Accrued warranty	49	(67)
Deferred revenue	1,622	11,257
Operating lease liabilities	(440)	(524)
Other liabilities	(231)	1,377
Net cash (used in) provided by operating activities	(5,823)	10,599
Investing activities:
Acquisition of property and equipment	(146)	(125)
Cash paid for business combination, net	0	(5,343)
Net cash used in investing activities	(146)	(5,468)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	0	9,878
Proceeds from stock option exercise	14	97
Taxes paid related to net share settlements of equity awards	(61)	(518)
Net cash (used in) provided by financing activities	(47)	9,457
Effect of foreign exchange rate changes	130	45
Net (decrease) increase in cash and cash equivalents	(5,886)	14,633
Cash and cash equivalents, beginning of period	23,852	11,626
Cash and cash equivalents, end of period	17,966	26,259
Supplemental disclosure of cash flow information:
Cash paid during the period for income taxes	77	23
Supplemental disclosure of non-cash activities:
Transfer of inventory (from) to property and equipment	(10)	78
ROU assets obtained with the modification of operating lease	$ 0	$ 1,824