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Balance Sheet Details (Tables) | 12 Months Ended
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Dec. 31, 2019
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, 2019 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
U.S. treasury bills and government agency obligations |  | $ | 140,567 |  |  | $ | 59 |  |  | $ | — |  |  | $ | 140,626 |
U.S. corporate debt |  |  | 80,159 |  |  |  | 11 |  |  |  | — |  |  |  | 80,170 |
Foreign corporate debt |  |  | 23,188 |  |  |  | 15 |  |  |  | — |  |  |  | 23,203 |
U.S. commercial paper |  |  | 32,801 |  |  |  | — |  |  |  | — |  |  |  | 32,801 |
Foreign commercial paper |  |  | 42,274 |  |  |  | — |  |  |  | — |  |  |  | 42,274 |
Total |  | $ | 318,989 |  |  | $ | 85 |  |  | $ | — |  |  | $ | 319,074 |
|  | December 31, 2018 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
U.S. treasury bills and government agency obligations |  | $ | 59,747 |  |  | $ | — |  |  | $ | (6 | ) |  | $ | 59,741 |
U.S. corporate debt securities |  |  | 59,164 |  |  |  | — |  |  |  | (77 | ) |  |  | 59,087 |
Foreign corporate debt securities |  |  | 5,041 |  |  |  | 5 |  |  |  | — |  |  |  | 5,046 |
U.S. commercial paper |  |  | 52,800 |  |  |  | — |  |  |  | — |  |  |  | 52,800 |
Foreign commercial paper |  |  | 123,870 |  |  |  | — |  |  |  | (9 | ) |  |  | 123,861 |
Total |  | $ | 300,622 |  |  | $ | 5 |  |  | $ | (92 | ) |  | $ | 300,535 |
Schedule of Inventory | Inventory consists of the following (in thousands):
|  | December 31, |
|  | 2019 |  |  | 2018 |
Raw materials |  | $ | 6,635 |  |  | $ | 10,112 |
Work in process |  |  | 12,571 |  |  |  | 20,604 |
Finished goods |  |  | 5,762 |  |  |  | 8,316 |
Total inventory |  | $ | 24,968 |  |  | $ | 39,032 |
Schedule of Property and Equipment, Net | Property and equipment, net consists of the following (in thousands):
|  | December 31, |
|  | 2019 |  |  | 2018 |
Scientific equipment |  | $ | 24,603 |  |  | $ | 18,077 |
Leasehold improvements |  |  | 206 |  |  |  | 1,783 |
Computer equipment and software |  |  | 1,314 |  |  |  | 1,190 |
Furniture, fixtures and office equipment |  |  | 1,520 |  |  |  | 1,722 |
Property and equipment, gross |  |  | 27,643 |  |  |  | 22,772 |
Less: accumulated depreciation and amortization |  |  | (8,025 | ) |  |  | (8,095 | )
Property and equipment, net |  | $ | 19,618 |  |  | $ | 14,677 |
Schedule of Accrued Liabilities | Accrued payroll and employee liabilities consist of the following (in thousands):
|  | December 31, |
|  | 2019 |  |  | 2018 |
Accrued employee salaries and benefits |  | $ | 3,047 |  |  | $ | 2,330 |
Accrued bonuses |  |  | 9,545 |  |  |  | 9,139 |
Accrued vacation |  |  | 2,656 |  |  |  | 1,928 |
Total accrued payroll and employee liabilities |  | $ | 15,248 |  |  | $ | 13,397 |
Other accrued liabilities consist of the following (in thousands):
|  | December 31, |
|  | 2019 |  |  | 2018 |
Accrued product sales allowances |  | $ | 27,939 |  |  | $ | 25,503 |
Accrued consulting and professional fees |  |  | 7,742 |  |  |  | 5,768 |
Deferred rent |  |  | — |  |  |  | 780 |
Accrued accounts payable |  |  | 310 |  |  |  | 224 |
Other accrued liabilities |  |  | 544 |  |  |  | 440 |
Total other accrued liabilities |  | $ | 36,535 |  |  | $ | 32,715 |

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