Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Operating activities:
Net loss	$ (5,225)	$ (6,329)
Adjustments to reconcile net loss to net cash used in operating activities:
Gain on PPP loan forgiveness	(2,497)
Depreciation and amortization	803	504
Loss on disposal of property and equipment	3	17
Stock-based compensation	1,628	1,119
Provision for doubtful accounts	37	181
Changes in operating assets and liabilities:
Accounts receivable	639	1,861
Receivable from related party	(3,106)
Inventories	268	2,382
Prepaid expenses and other current assets	(341)	(328)
Operating lease right-of-use assets	905	1,342
Other long-term assets	(143)	27
Accounts payable	1,625	(1,445)
Payable to related party	627
Accrued compensation	1,228	(434)
Accrued expenses	588	218
Accrued warranty	(89)	(289)
Deferred revenue	12,058	(583)
Operating lease liabilities	(1,076)	(1,524)
Other long-term liabilities	285	44
Net cash provided by (used in) operating activities	8,217	(3,237)
Investing activities:
Acquisition of property and equipment	(213)	(97)
Cash paid for business combination, net	(5,343)
Proceeds from sale of property and equipment		4
Net cash used in investing activities	(5,556)	(93)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	9,878
Proceeds for stock option exercise	217
Taxes paid related to net share settlements of equity awards	(629)	(30)
Proceeds from PPP loan		2,497
Net cash provided by financing activities	9,466	2,467
Effect of foreign exchange rate changes	99	(164)
Net increase (decrease) in cash and cash equivalents	12,226	(1,027)
Cash and cash equivalents, beginning of year	11,626	12,653
Cash and cash equivalents, end of year	23,852	11,626
Supplemental disclosure of cash flow information:
Cash paid (received) during the year for income taxes	15	(74)
Supplemental disclosure of non-cash activities:
Transfer of inventory to property and equipment	118	$ 129
ROU assets obtained with the modification of operating lease	$ 2,042