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v3.25.3

The Company and Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of inventory | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
​ |  | 2025 |  | 2024
Raw materials | ​ | $ | 1,592 | ​ | $ | 1,539
Work in process | ​ |  | 93 | ​ |  | 123
Finished goods | ​ |  | 133 | ​ |  | 135
​ | ​ | $ | 1,818 | ​ | $ | 1,797
Schedule of ASRs, net and components of finished ASRs, net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
​ |  | 2025 |  | 2024
Raw materials | ​ | $ | 2,677 | ​ | $ | 2,465
ASRs in progress | ​ |  | 163 | ​ |  | 322
Finished ASRs | ​ |  | 12,165 | ​ |  | 11,790
​ | ​ |  | 15,005 | ​ |  | 14,577
Less: accumulated depreciation on Finished ASRs | ​ |  | (7,053) | ​ |  | (5,812)
ASRs, net | ​ | $ | 7,952 | ​ | $ | 8,765
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
​ |  | 2025 |  | 2024
ASRs on lease or available for lease | ​ | $ | 10,849 | ​ | $ | 10,553
Demonstration ASRs | ​ |  | 392 | ​ | ​ | 587
Research and development ASRs | ​ |  | 546 | ​ | ​ | 102
Charge boxes | ​ | ​ | 378 | ​ | ​ | 548
​ | ​ |  | 12,165 | ​ | ​ | 11,790
Less: accumulated depreciation | ​ |  | (7,053) | ​ | ​ | (5,812)
Finished ASRs, net | ​ | $ | 5,112 | ​ | $ | 5,978
Schedule of gross carrying amounts and accumulated amortization of the intangible assets with determinable lives | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | September 30, 2025
​ | ​ | Amortization | ​ | Gross | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Period | ​ | carrying | ​ | Accumulated | ​ | Carrying
Intangible assets with determinable lives |  | (years) |  | amount |  | amortization |  | amount, net
Developed technology |  | 5 | ​ | $ | 990 | ​ | $ | (586) | ​ | $ | 404
Customer relationships |  | 8 | ​ |  | 950 | ​ |  | (351) | ​ |  | 599
Total | ​ | ​ | ​ | $ | 1,940 | ​ | $ | (937) | ​ | $ | 1,003
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | December 31, 2024
​ | ​ | Amortization | ​ | Gross | ​ | ​ | ​ | ​
​ | ​ | Period | ​ | carrying | ​ | Accumulated | ​ | Carrying
Intangible assets with determinable lives | ​ | (years) |  | amount |  | amortization |  | amount, net
Developed technology |  | 5 | ​ | $ | 990 | ​ | $ | (437) |  | $ | 553
Customer relationships |  | 8 | ​ |  | 950 | ​ |  | (262) |  |  | 688
Total | ​ | ​ | ​ | $ | 1,940 | ​ | $ | (699) |  | $ | 1,241
Schedule of future intangible assets amortization expense | ​
​ | ​ | ​ | ​
Year ending December 31, |  | Amount
2025 (remaining 3 months) | ​ | $ | 79
2026 | ​ |  | 317
2027 | ​ |  | 275
2028 | ​ |  | 118
2029 | ​ |  | 119
2030 | ​ | ​ | 95
Total | ​ | $ | 1,003
Schedule of accrued expenses and other current liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | December 31,
​ | ​ | 2025 | ​ | 2024
Legal, consulting and financial services | ​ | $ | 1,041 | ​ | $ | 58
Sales tax | ​ | ​ | 68 | ​ | ​ | 378
Warranty liability | ​ | ​ | 386 | ​ |  | 364
Payroll and payroll taxes | ​ | ​ | 119 | ​ | ​ | 364
Customer deposits | ​ |  | 203 | ​ |  | 82
Credit cards | ​ |  | 183 | ​ | ​ | 128
Accrued interest | ​ | ​ | 315 | ​ | ​ | —
Other | ​ |  | 333 | ​ |  | 420
​ | ​ | $ | 2,648 | ​ | $ | 1,794
Schedule of change in the warranty liability | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30,
​ | ​ | 2025 |  | 2024
Balance January 1, | ​ | $ | 364 | ​ | $ | 406
Provision for warranties issued | ​ |  | 224 | ​ |  | 331
Warranty services provided | ​ |  | (202) | ​ |  | (291)
​ | ​ | $ | 386 | ​ | $ | 446
Schedule of potentially dilutive securities that were excluded from the computation of diluted net loss per share | ​
​ | ​ | ​ | ​ | ​
​ |  | September 30, | ​ | September 30,
​ | ​ | 2025 |  | 2024
Warrants to purchase common stock (convertible to Class A Common Stock) | ​ | 186,411 | ​ | 150,111
Stock options |  | 319,493 |  | 298,863
Total potentially dilutive shares |  | 505,904 |  | 448,974

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