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Balance Sheets Components (Tables) | 12 Months Ended
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Dec. 31, 2021
Balance Sheet Related Disclosures [Abstract] |
Schedule of Accounts Receivable, Net | Accounts receivable, net consisted of the following:
|  | As of |
|  | December 31, 2021 |  |  | December 31, 2020 |
|  | (in thousands) |
Accounts receivable, gross |  | $ | 38,426 |  |  | $ | 23,970 |
Allowance for credit losses |  |  | (50 | ) |  |  | (50 | )
Accounts receivable, net |  | $ | 38,376 |  |  | $ | 23,920 |
Schedule of Inventory | Inventory consisted of the following:
|  | As of |
|  | December 31, 2021 |  |  | December 31, 2020 |
|  | (in thousands) |
Raw materials |  | $ | 1,841 |  |  | $ | 435 |
Work in progress |  |  | 16,963 |  |  |  | 10,184 |
Finished goods |  |  | 4,826 |  |  |  | 1,731 |
Total inventories |  | $ | 23,630 |  |  | $ | 12,350 |
Schedule of Prepaid Expenses and Other Current Assets | Prepaid expenses and other current assets consisted of the following:
|  | As of |
|  | December 31, 2021 |  |  | December 31, 2020 |
|  | (in thousands) |
Advance to suppliers |  | $ | — |  |  | $ | 853 |
Prepaid expenses |  |  | 2,398 |  |  |  | 1,074 |
Other current assets |  |  | 2,078 |  |  |  | 722 |
Total prepaid and other current assets |  | $ | 4,476 |  |  | $ | 2,649 |
Schedule of Property and Equipment Net | Property and equipment, net consisted of the following:
|  | As of |
|  | December 31, 2021 |  |  | December 31, 2020 |
|  | (in thousands) |
Lab and manufacturing equipment |  | $ | 44,283 |  |  | $ | 21,958 |
Computer equipment |  |  | 1,977 |  |  |  | 1,121 |
Furniture and fixtures |  |  | 433 |  |  |  | 237 |
Construction in progress |  |  | 7,100 |  |  |  | 638 |
Leasehold improvements |  |  | 5,211 |  |  |  | 4,134 |
|  |  | 59,004 |  |  |  | 28,088 |
Accumulated depreciation |  |  | (21,102 | ) |  |  | (16,380 | )
Total property and equipment, net |  | $ | 37,902 |  |  | $ | 11,708 |
Schedule of Intangible Assets, Net | Intangible assets, net consisted of the following:
|  | As of |
|  | December 31, 2021 |  |  | December 31, 2020 |
|  | (in thousands) |
|  | Gross Assets |  |  | Accumulated Amortization |  |  | Net Assets |  |  | Gross Assets |  |  | Accumulated Amortization |  |  | Net Assets |
|  | (in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |
Internal use software |  | $ | 9,434 |  |  | $ | (8,633 | ) |  | $ | 801 |  |  | $ | 9,377 |  |  | $ | (8,312 | ) |  | $ | 1,065 |
Purchased intangibles |  |  | 11,703 |  |  |  | (6,527 | ) |  |  | 5,176 |  |  |  | 5,663 |  |  |  | (4,659 | ) |  |  | 1,004 |
Intangible assets |  | $ | 21,137 |  |  | $ | (15,160 | ) |  | $ | 5,977 |  |  | $ | 15,040 |  |  | $ | (12,971 | ) |  | $ | 2,069 |
Schedule of Future Amortization Expense for Intangible Assets | The estimated aggregate future amortization expense for intangible assets in development stage and subject to amortization as of December 31, 2021 is summarized as below:
|  | As of |
|  | December 31, 2021 |
|  | (in thousands) |
2022 |  | $ | 2,277 |
2023 |  |  | 2,207 |
2024 |  |  | 1,311 |
2025 |  |  | 168 |
2026 |  |  | 14 |
|  | $ | 5,977 |
Schedule of Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities consisted of the following:
|  | As of |
|  | December 31, 2021 |  |  | December 31, 2020 |
|  | (in thousands) |
Accrued payroll and related benefits |  | $ | 7,237 |  |  | $ | 5,362 |
Deferred non-recurring engineering services |  |  | 5,666 |  |  |  | - |
Revenue reserves |  |  | 4,517 |  |  |  | 3,063 |
Short term lease liability |  |  | 1,336 |  |  |  | 1,264 |
Accrued customer rebates |  |  | 784 |  |  |  | 380 |
Other accrued expenses |  |  | 4,742 |  |  |  | 2,894 |
Total accrued expenses and other current liabilities |  | $ | 24,282 |  |  | $ | 12,963 |

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