Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Cash flows provided by (used in) operating activities:
Net income (loss)	$ (3,841)	$ (263)	$ (4,267)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	3,613	1,807	1,147
ROU asset amortization	269	348	345
Stock-based compensation	4,606	2,522	2,035
Write-down of inventories	82	606	224
Other	(4)	16	(9)
Changes in operating assets and liabilities:
Accounts receivable	(807)	1,048	(1,708)
Contract assets	927	(1,622)	(1,692)
Inventories	289	(142)	(639)
Other assets	596	(958)	(220)
Trade payables	(3,601)	91	1,455
Accrued liabilities	(1,081)	1,003	(156)
Deferred revenue	(598)	780	(183)
Lease liabilities	(298)	(389)	(366)
Other long-term liabilities	(125)	0	(22)
Net cash provided by (used in) operating activities	27	4,847	(4,056)
Cash flows provided by (used in) investing activities:
Capital expenditures for property and equipment	(5,404)	(5,467)	(142)
Capitalized internal-use software	(967)	(872)	(672)
Purchases of intangible assets	(94)	0	0
Net cash provided by (used in) investing activities	(6,465)	(6,339)	(814)
Cash flows provided by (used in) financing activities:
Payment of notes payable	(1,384)	(701)	(452)
Proceeds from notes payable	0	105	0
Proceeds from line of credit	78,000	65,000	60,000
Repayment of line of credit	(80,000)	(60,000)	(60,000)
Proceeds from issuance of common stock	310	200	253
Proceeds from issuance of common stock to investors	6,810	2,313	4,682
Stock issuance costs	(24)	(20)	(17)
Net cash provided by (used in) financing activities	3,712	6,897	4,466
Net increase (decrease) in cash, cash equivalents and restricted cash	(2,726)	5,405	(404)
Cash, cash equivalents and restricted cash at the beginning of the period	24,606	19,201	19,605
Cash, cash equivalents, and restricted cash at the end of the period	21,880	24,606	19,201
Supplemental disclosures of cash flow information:
Interest paid	344	81	86
Income taxes paid	33	14	16
Purchases of assets with financing arrangements	3,107	1,116	650
Stock-based compensation capitalized as internal-use software	149	248	0
Stock-based compensation capitalized as tooling and fixed assets	9	0	0
Purchases of property and equipment in accounts payable and accrued liabilities	$ 2,041	$ 2,101	$ 1