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v3.24.1.1.u2

Balance Sheet Components (Tables) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Balance Sheet Components |  |
Schedule of Inventory | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, |  | December 31,
​ | ​ | 2024 | ​ | 2023
Raw materials | ​ | $ | 414 | ​ | $ | 448
Work-in-process |  | ​ | 498 |  | ​ | 601
Finished goods |  | ​ | 872 |  | ​ | 437
Total inventory | ​ | $ | 1,784 | ​ | $ | 1,486
| ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2023 |  | 2022
Raw materials | ​ | $ | 448 | ​ | $ | 182
Work-in-process | ​ |  | 601 | ​ |  | 891
Finished goods | ​ |  | 437 | ​ |  | 2,407
​ | ​ | $ | 1,486 | ​ | $ | 3,480
Schedule of Prepaid expenses and other assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, |  | December 31,
​ | ​ | 2024 | ​ | 2023
Prepaid expenses | ​ | $ | 3,345 | ​ | $ | 433
Prepaid inventory | ​ | ​ | 1,429 | ​ | ​ | 279
Lease deposit |  | ​ | 413 |  | ​ | 434
Other receivables and current assets |  | ​ | 279 |  | ​ | 117
IPO expenses |  | ​ | — |  | ​ | 1,643
Prepaid expenses and other current assets | ​ | $ | 5,466 | ​ | $ | 2,906
| ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2023 |  | 2022
IPO expenses | ​ | $ | 1,643 | ​ | $ | —
Intellectual property rights | ​ |  | 761 | ​ |  | 861
Lease deposit | ​ |  | 554 | ​ |  | 555
Prepaid expenses | ​ |  | 433 | ​ |  | 799
Prepaid inventory | ​ |  | 279 | ​ |  | 1,310
Other receivables | ​ |  | 105 | ​ |  | 102
Costs incurred to fulfill a contract | ​ |  | 12 | ​ |  | 39
​ | ​ |  | 3,787 | ​ |  | 3,666
Less: Non-current assets | ​ |  | (881) | ​ |  | (993)
Prepaid expenses and other current assets | ​ | $ | 2,906 | ​ | $ | 2,673
Schedule of Property and equipment, net |  | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2023 |  | 2022
Production equipment | ​ | $ | 14,887 | ​ | $ | 14,800
IT equipment | ​ |  | 1,127 | ​ |  | 1,212
Furniture and fixtures | ​ |  | 784 | ​ |  | 799
Leasehold improvements | ​ |  | 293 | ​ |  | 388
Fixed assets in process | ​ |  | — | ​ |  | 39
Total property and equipment | ​ |  | 17,091 | ​ |  | 17,238
Less: accumulated depreciation and amortization | ​ |  | (16,319) | ​ |  | (16,127)
​ | ​ | $ | 772 | ​ | $ | 1,111
Schedule of components of lease expense and other information related to leases |  | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2023 |  | 2022
Operating lease expense | ​ | $ | 772 | ​ | $ | 733
Finance lease expense | ​ |  |  | ​ |  |
Amortization of right of use assets | ​ |  | 14 | ​ |  | 18
Interest on lease liabilities | ​ |  | 1 | ​ |  | 2
Total finance lease expense | ​ |  | 15 | ​ |  | 20
​ | ​ | $ | 787 | ​ | $ | 753
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2023 |  | 2022 |
Supplemental cash flow information: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash paid for amounts included in the measurement of lease liabilities |  | ​ |  |  | ​ |  | ​
Cash used in operations for operating leases | ​ | $ | 766 | ​ | $ | 770 | ​
Cash used in operations for finance leases | ​ |  | 1 | ​ |  | 2 | ​
Payments made on finance leases | ​ |  | 17 | ​ |  | 24 | ​
ROU assets obtained in exchange for lease obligations: | ​ |  |  | ​ |  |  | ​
Operating leases | ​ |  | 1,476 | ​ |  | 826 | ​
Weighted average remaining lease term: | ​ |  |  | ​ |  |  | ​
Operating leases | ​ |  | 2.25 years | ​ |  | 3.57 years | ​
Finance leases | ​ |  | — | ​ |  | 0.90 years | ​
Weighted average discount rate: | ​ |  |  | ​ |  |  | ​
Operating leases | ​ |  | 4.66 | % |  | 4.00 | %
Finance leases | ​ |  | — | ​ |  | 9.70 | %
Schedule of Maturities of lease liabilities under noncancellable leases |  | ​
​ | ​ | ​ | ​
​ |  | Operating
(in thousands) | ​ | leases
2024 | ​ | $ | 743
2025 | ​ |  | 712
2026 | ​ |  | 169
Total undiscounted lease payments | ​ |  | 1,624
Less: imputed interest | ​ |  | (94)
Total lease liabilities | ​ | $ | 1,530
Schedule of Intangibles, net |  | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2023 |  | 2022
Intellectual properties | ​ | $ | 1,118 | ​ | $ | 943
Intangible assets in process | ​ |  | — | ​ |  | 180
Total acquired intangibles | ​ |  | 1,118 | ​ |  | 1,123
Less: accumulated amortization | ​ |  | (873) | ​ |  | (451)
​ | ​ | $ | 245 | ​ | $ | 672
Schedule of Accrued and other current liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, |  | December 31,
​ | ​ | 2024 | ​ | 2023
Payroll and related expenses | ​ | $ | 9,830 | ​ | $ | 9,880
Accrued payables | ​ | ​ | 7,853 | ​ | ​ | 6,319
Other taxes payable | ​ | ​ | 3,399 | ​ | ​ | 158
Current portion of interest payable | ​ | ​ | 3,395 | ​ | ​ | 6,915
Professional fees |  | ​ | 444 |  | ​ | 499
Royalty and license fee |  | ​ | 60 |  | ​ | 58
Product warranty |  | ​ | 64 |  | ​ | 55
Other |  | ​ | 107 |  | ​ | 72
Accrued and other current liabilities | ​ | $ | 25,152 | ​ | $ | 23,956
​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2023 |  | 2022
Payroll and related expenses | ​ | $ | 10,038 | ​ | $ | 6,635
Accrued payables | ​ |  | 6,319 | ​ |  | 2,233
Royalty and license fee | ​ |  | 58 | ​ |  | 37
Professional fees | ​ |  | 499 | ​ |  | 479
Current portion of interest payable | ​ |  | 6,915 | ​ |  | 2,944
Product warranty | ​ |  | 55 | ​ |  | 64
Other | ​ |  | 72 | ​ |  | 104
​ | ​ | $ | 23,956 | ​ | $ | 12,496
Schedule of Other liabilities |  | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2023 |  | 2022
Severance payments liability | ​ | $ | 92 |  | $ | 76
Interest payable | ​ |  | 16 |  |  | —
​ | ​ | $ | 108 |  | $ | 76
​

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