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Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Apr. 02, 2023
Apr. 03, 2022
Cash flows from operating activities:    
Net loss $ (1,228) $ (1,164)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 197 162
Stock-based compensation 715 383
Write-down of inventories and reclassifications 171 (26)
Bad debt recovery (10) 0
Changes in operating assets and liabilities:    
Accounts receivable 609 (393)
Contract assets (341) 106
Inventories (175) (188)
Other assets (495) 65
Trade payables 7 467
Accrued liabilities 196 298
Deferred revenue 27 (388)
Other long-term liabilities 65 (22)
Net cash used in operating activities (262) (700)
Cash flows from investing activities:    
Capital expenditures for property and equipment (3) (10)
Capitalized internal-use software (185) (139)
Net cash used in investing activities (188) (149)
Cash flows from financing activities:    
Payment of finance lease obligations (142) (98)
Proceeds from line of credit 15,000 15,000
Repayment of line of credit (15,000) (15,000)
Proceeds from issuance of common stock 2,313 1,482
Stock issuance cost (20) 0
Net cash provided by financing activities 2,151 1,384
Net increase in cash, cash equivalents and restricted cash 1,701 535
Cash, cash equivalents and restricted cash at beginning of period 19,201 19,605
Cash, cash equivalents and restricted cash at end of period 20,902 20,140
Supplemental disclosures of cash flow information:    
Interest paid 56 24
Income taxes paid $ 2 $ 10