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Balance Sheet Details (Tables) | 12 Months Ended
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Dec. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Summary of Short-Term Investments | The following is a summary of our short-term investments (in thousands):
|  | December 31, 2021 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
U.S. corporate debt |  | $ | 15,009 |  |  | $ | — |  |  | $ | (3 | ) |  | $ | 15,006 |
Foreign corporate debt |  |  | 10,551 |  |  |  | — |  |  |  | (3 | ) |  |  | 10,548 |
U.S. commercial paper |  |  | 5,998 |  |  |  | — |  |  |  | — |  |  |  | 5,998 |
Foreign commercial paper |  |  | 35,487 |  |  |  | — |  |  |  | — |  |  |  | 35,487 |
Total |  | $ | 67,045 |  |  | $ | — |  |  | $ | (6 | ) |  | $ | 67,039 |
|  | December 31, 2020 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
U.S. treasury bills and government agency obligations |  | $ | 20,110 |  |  | $ | 166 |  |  | $ | — |  |  | $ | 20,276 |
U.S. corporate debt securities |  |  | 11,505 |  |  |  | 42 |  |  |  | — |  |  |  | 11,547 |
Foreign corporate debt securities |  |  | 15,508 |  |  |  | 49 |  |  |  | — |  |  |  | 15,557 |
U.S. commercial paper |  |  | 13,997 |  |  |  | — |  |  |  | — |  |  |  | 13,997 |
Foreign commercial paper |  |  | 41,976 |  |  |  | — |  |  |  | — |  |  |  | 41,976 |
Total |  | $ | 103,096 |  |  | $ | 257 |  |  | $ | — |  |  | $ | 103,353 |
Schedule of Inventory | Inventory consists of the following (in thousands):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Raw materials |  | $ | 21,193 |  |  | $ | 18,994 |
Work in process |  |  | 20,935 |  |  |  | 6,847 |
Finished goods |  |  | 6,254 |  |  |  | 16,064 |
Total inventory |  | $ | 48,382 |  |  | $ | 41,905 |
Schedule of Prepaid Expenses and Other Assets | Prepaid expenses and other assets consist of the following (in thousands):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Prepaid expenses |  | $ | 28,048 |  |  | $ | 19,461 |
Prepaid insurance |  |  | 2,135 |  |  |  | 2,155 |
Deposits |  |  | 254 |  |  |  | 346 |
Interest receivable |  |  | 245 |  |  |  | 334 |
Total prepaid expenses and other assets |  | $ | 30,682 |  |  | $ | 22,296 |
Schedule of Property and Equipment, Net | Property and equipment, net consists of the following (in thousands):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Scientific equipment |  | $ | 33,403 |  |  | $ | 29,135 |
Leasehold improvements |  |  | 610 |  |  |  | 878 |
Computer equipment and software |  |  | 1,497 |  |  |  | 1,461 |
Furniture, fixtures and office equipment |  |  | 1,467 |  |  |  | 2,135 |
Property and equipment, gross |  |  | 36,977 |  |  |  | 33,609 |
Less: accumulated depreciation and amortization |  |  | (13,243 | ) |  |  | (10,872 | )
Property and equipment, net |  | $ | 23,734 |  |  | $ | 22,737 |
Schedule of Accrued Liabilities | Accrued payroll and employee liabilities consist of the following (in thousands):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Accrued employee salaries and benefits |  | $ | 1,784 |  |  | $ | 1,691 |
Accrued bonuses |  |  | 9,439 |  |  |  | 8,479 |
Accrued vacation |  |  | 4,040 |  |  |  | 3,427 |
Total accrued payroll and employee liabilities |  | $ | 15,263 |  |  | $ | 13,597 |
Other accrued liabilities consist of the following (in thousands):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Accrued product sales allowances |  | $ | 22,560 |  |  | $ | 24,571 |
Accrued consulting and professional fees |  |  | 2,666 |  |  |  | 3,450 |
Accrued accounts payable |  |  | 70 |  |  |  | 104 |
Other accrued liabilities |  |  | 563 |  |  |  | 244 |
Total other accrued liabilities |  | $ | 25,859 |  |  | $ | 28,369 |

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