Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022
Operating activities:
Net loss	$ (6,610)	$ (6,399)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	479	399
Amortization of operating lease right-of-use assets	777	702
Stock-based compensation	1,244	1,105
Provision for credit losses	0	187
Changes in operating assets and liabilities:
Accounts receivable	363	259
Receivable from related party	1,534	(481)
Inventories	409	(3,214)
Prepaid expenses and other current assets	339	(913)
Other long-term assets	(227)	(1,078)
Accounts payable	(1,247)	1,770
Payable to related party	(12)	(526)
Accrued compensation	(251)	(328)
Accrued expenses	(377)	132
Accrued warranty	111	75
Deferred revenue	(1,442)	1,318
Operating lease liabilities	(774)	(682)
Other liabilities	(82)	(255)
Net cash used in operating activities	(5,766)	(7,929)
Investing activities:
Acquisition of property and equipment	(141)	(203)
Net cash used in investing activities	(141)	(203)
Financing activities:
Proceeds from stock option exercises	37	21
Taxes paid related to net share settlements of equity awards	(87)	(94)
Net cash used in financing activities	(50)	(73)
Effect of foreign exchange rate changes	16	209
Net decrease in cash and cash equivalents	(5,941)	(7,996)
Cash and cash equivalents, beginning of period	13,922	23,852
Cash and cash equivalents, end of period	7,981	15,856
Supplemental disclosure of cash flow information:
Cash paid during the period for income taxes	54	81
Supplemental disclosure of non-cash activities:
Transfer of inventory to (from) property and equipment	70	0
ROU assets obtained with extension of operating lease	$ 1,901	$ 0