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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Cash flows from operating activities:    
Net loss $ (22,469) $ (26,412)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 1,062 781
Operating lease right-of-use amortization 714 766
Finance lease right-of-use amortization 14 18
Stock-based compensation 43 17
Provision for credit losses 1,095 549
Loss on valuation of convertible promissory notes 1,428 450
Loss on redemption of convertible promissory notes   40
Changes in operating assets and liabilities:    
Accounts receivable (1,562) 858
Inventory 1,994 (1,772)
Contract assets (2,553) (225)
Prepaid expenses and other current assets (233) 1,150
Other assets 112 4
Accounts payable 296 6,145
Contract liabilities (603) (116)
Accrued and other current liabilities 11,471 1,772
Net defined benefit liabilities 784 (699)
Income taxes payable 255 57
Lease liabilities (707) (791)
Other liabilities 32 (661)
Net cash used in operating activities (8,827) (18,087)
Cash flows from investing activities:    
Purchase of property and equipment (331) (623)
Purchase of intangibles   (280)
Net cash used in investing activities (331) (903)
Cash flows from financing activities:    
Proceeds from bank borrowings 8,147 13,414
Proceeds from exercise of stock options 23 51
Proceeds from issuance of convertible promissory note 2,000 9,000
Repayment of bank borrowings (1,504) (1,988)
Repayment of convertible promissory note (500) (1,180)
Payments of finance lease liabilities (17) (24)
Net cash provided by financing activities 8,149 19,273
Effect of exchange rate changes on cash and cash equivalents (131) (136)
Net increase (decrease) in cash and cash equivalents (1,140) 147
Cash and cash equivalents at beginning of year 1,398 1,251
Cash and cash equivalents cash at end of year 258 1,398
Supplemental disclosures of cash flow information:    
Cash paid for interest 2,259 4,175
Cash paid for income taxes 116 333
Noncash financing activities:    
Accretion of Series G redeemable convertible preferred stock to redemption amount   2,237
Issuance of common stock from conversion of convertible promissory notes and accrued interest 72 35,830
Issuance of common stock from cashless warrant exercise $ 1,499  
Conversion of redeemable convertible preferred stock to common stock   $ 384,525