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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Jan. 01, 2023
Jan. 02, 2022
Cash flows provided by (used in) operating activities:      
Net income (loss) $ (263) $ (4,267) $ (6,616)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:      
Depreciation and amortization 1,807 1,147 1,004
ROU asset amortization 348 345 325
Stock-based compensation 2,522 2,035 2,526
Write-down of inventories 606 224 225
Gain on forgiveness of PPP Loan 0 0 (1,192)
Other 16 (9) 57
Changes in operating assets and liabilities:      
Accounts receivable 1,048 (1,708) 627
Contract assets (1,622) (1,692) (295)
Inventories (142) (639) 385
Other assets (958) (220) (444)
Trade payables 91 1,455 (2)
Accrued liabilities 1,003 (156) 325
Deferred revenue 780 (183) 403
Lease liabilities (389) (366) (339)
Other long-term liabilities 0 (22) 147
Net cash provided by (used in) operating activities 4,847 (4,056) (2,864)
Cash flows provided by (used in) investing activities:      
Capital expenditures for property and equipment (5,467) (142) (180)
Capitalized internal-use software (872) (672) (533)
Net cash provided by (used in) investing activities (6,339) (814) (713)
Cash flows provided by (used in) financing activities:      
Payment of notes payable (701) (452) (378)
Proceeds from notes payable 105 0 0
Proceeds from line of credit 65,000 60,000 60,000
Repayment of line of credit (60,000) (60,000) (60,000)
Proceeds from issuance of common stock 200 253 263
Proceeds from issuance of common stock to investors 2,313 4,682 1,079
Stock issuance costs (20) (17) (45)
Taxes paid related to net settlement of equity awards 0 0 (485)
Net cash provided by (used in) financing activities 6,897 4,466 434
Net increase (decrease) in cash, cash equivalents and restricted cash 5,405 (404) (3,143)
Cash, cash equivalents and restricted cash at the beginning of the period 19,201 19,605 22,748
Cash, cash equivalents, and restricted cash at the end of the period 24,606 19,201 19,605
Supplemental disclosures of cash flow information:      
Interest paid 81 86 77
Income taxes paid 14 16 73
Purchases of property and equipment with financing arrangements 1,116 650 690
Stock-based compensation capitalized as internal-use software 248 0 0
Purchases of property and equipment in accounts payable $ 2,101 $ 1 $ 1