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Balance Sheets Components (Tables) | 3 Months Ended
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Mar. 31, 2022
Balance Sheet Related Disclosures [Abstract] |
Schedule of Accounts Receivable, Net | Accounts receivable, net consisted of the following:
|  | As of |
|  | March 31, 2022 |  |  | December 31, 2021 |
|  | (in thousands) |
Accounts receivable, gross |  | $ | 30,701 |  |  | $ | 38,426 |
Allowance for credit losses |  |  | (50 | ) |  |  | (50 | )
Accounts receivable, net |  | $ | 30,651 |  |  | $ | 38,376 |
Schedule of Inventory | Inventories consisted of the following:
|  | As of |
|  | March 31, 2022 |  |  | December 31, 2021 |
|  | (in thousands) |
Raw materials |  | $ | 3,848 |  |  | $ | 1,841 |
Work in progress |  |  | 19,945 |  |  |  | 16,963 |
Finished goods |  |  | 6,960 |  |  |  | 4,826 |
Total inventories |  | $ | 30,753 |  |  | $ | 23,630 |
Schedule of Prepaid Expenses and Other Current Assets | Prepaid expenses and other current assets consisted of the following:
|  | As of |
|  | March 31, 2022 |  |  | December 31, 2021 |
|  | (in thousands) |
Prepaid expenses |  | $ | 3,078 |  |  | $ | 2,398 |
Other current assets |  |  | 1,812 |  |  |  | 2,078 |
Total prepaid expenses and other current assets |  | $ | 4,890 |  |  | $ | 4,476 |
Schedule of Property and Equipment Net | Property and equipment, net consisted of the following:
|  | As of |
|  | March 31, 2022 |  |  | December 31, 2021 |
|  | (in thousands) |
Lab and manufacturing equipment |  | $ | 51,527 |  |  | $ | 44,283 |
Computer Equipment |  |  | 2,095 |  |  |  | 1,977 |
Furniture and fixtures |  |  | 433 |  |  |  | 433 |
Construction in progress |  |  | 7,883 |  |  |  | 7,100 |
Leasehold improvements |  |  | 5,438 |  |  |  | 5,211 |
|  |  | 67,376 |  |  |  | 59,004 |
Accumulated depreciation |  |  | (23,165 | ) |  |  | (21,102 | )
Total property and equipment, net |  | $ | 44,211 |  |  | $ | 37,902 |
Schedule of Intangible Assets, Net | Intangible assets, net consisted of the following:
|  | As of |
|  | March 31, 2022 |  |  | December 31, 2021 |
|  | (in thousands) |
|  | Gross Assets |  |  | Accumulated Amortization |  |  | Net Assets |  |  | Gross Assets |  |  | Accumulated Amortization |  |  | Net Assets |
Internal use software |  | $ | 9,434 |  |  | $ | (8,633 | ) |  | $ | 801 |  |  | $ | 9,434 |  |  | $ | (8,633 | ) |  | $ | 801 |
Purchased intangibles |  |  | 10,438 |  |  |  | (6,846 | ) |  |  | 3,592 |  |  |  | 11,703 |  |  |  | (6,527 | ) |  |  | 5,176 |
Intangible assets |  | $ | 19,872 |  |  | $ | (15,479 | ) |  | $ | 4,393 |  |  | $ | 21,137 |  |  | $ | (15,160 | ) |  | $ | 5,977 |
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 March 31, 2022 is summarized as below:
|  | (in thousands) |
2022 (remainder) |  | $ | 1,359 |
2023 |  |  | 1,786 |
2024 |  |  | 1,025 |
2025 |  |  | 195 |
2026 and beyond |  |  | 28 |
|  | $ | 4,393 |
Schedule of Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities consisted of the following:
|  | As of |
|  | March 31, 2022 |  |  | December 31, 2021 |
|  | (in thousands) |
Accrued payroll and related benefits |  | $ | 3,711 |  |  | $ | 7,237 |
Revenue reserves |  |  | 5,424 |  |  |  | 4,517 |
Deferred non-recurring engineering services |  |  | 4,739 |  |  |  | 5,666 |
Short term lease liability |  |  | 2,109 |  |  |  | 1,336 |
Accrued customer rebates |  |  | — |  |  |  | 784 |
Other accrued expenses |  |  | 5,582 |  |  |  | 4,742 |
Total accrued expenses and other current liabilities |  | $ | 21,565 |  |  | $ | 24,282 |
For the three months ended March 31, 2022, the Company recorded $2.0 million as a reduction of research and development expenses related to non-recurring engineering service arrangements in the condensed consolidated statement of operations. There was no reduction of research and development expenses recorded during the three months ended March 31, 2021.

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