Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2023	Jan. 02, 2022	Jan. 03, 2021
Cash flows from operating activities:
Net loss	$ (4,267)	$ (6,616)	$ (11,151)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	710	626	817
Stock-based compensation	2,035	2,526	1,739
Write-down of inventories	224	225	199
Gain on forgiveness of PPP Loan	0	(1,192)	0
Loss (gain) on disposal of equipment	(27)	(5)	44
Bad debt expense	18	62	0
Changes in operating assets and liabilities:
Accounts receivable	(1,708)	627	303
Contract assets	(1,692)	(295)	0
Inventories	(639)	385	373
Other assets	(321)	(444)	533
Trade payables	1,871	367	298
Accrued liabilities	(55)	325	207
Deferred income	(183)	403	(106)
Other long-term liabilities	(22)	147	0
Net cash used in operating activities	(4,056)	(2,859)	(6,744)
Cash flows from investing activities:
Capital expenditures for property and equipment	(142)	(185)	(253)
Capitalized internal-use software	(672)	(533)	(801)
Net cash used in investing activities	(814)	(718)	(1,054)
Cash flows from financing activities:
Payment of finance lease obligations	(452)	(378)	(270)
Proceeds from PPP loan	0	0	1,191
Proceeds from line of credit	60,000	60,000	57,000
Repayment of line of credit	(60,000)	(60,000)	(57,000)
Gross Proceeds from issuance of common stock	4,935	1,342	9,296
Stock issuance costs	(17)	(45)	(1,147)
Taxes paid related to net settlement of equity awards	0	(485)	(72)
Net cash provided by financing activities	4,466	434	8,998
Net (decrease) increase in cash, cash equivalents and restricted cash	(404)	(3,143)	1,200
Cash, cash equivalents and restricted cash at the beginning of the period	19,605	22,748	21,548
Cash, cash equivalents, and restricted cash at the end of the period	19,201	19,605	22,748
Supplemental disclosures of cash flow information:
Interest paid	86	77	277
Income taxes paid	16	73	24
Supplemental schedule of non-cash investing and financing activities:
Finance lease obligations entered in during the year	$ 650	$ 690	$ 670