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Balance Sheet Components - Other Accrued Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Balance Sheet Components |  |  |  |
Reserves for refunds to insurance carriers | $ 15,912 | $ 17,210 | $ 22,301 | $ 17,366
Accrued charges for third-party testing | 23,142 | 5,849 |  |
Testing and laboratory materials from suppliers | 13,997 | 3,799 |  |
Marketing and corporate affairs | 6,449 | 7,853 |  |
Legal, audit and consulting fees | 21,374 | 11,758 |  |
Accrued shipping charges | 2,157 | 969 |  |
Sales tax payable | 1,857 | 2,230 |  |
Accrued third-party service fees | 1,354 | 13,442 |  |
Clinical trials and studies | 21,166 | 11,218 |  |
Operating lease liabilities, current portion | 5,636 | 5,752 |  |
Fixed asset purchases | 5,608 | 1,853 |  |
Other accrued interest | 1,078 | 1,078 |  |
Other accrued expenses | 4,642 | 10,342 |  |
Total other accrued liabilities | $ 124,372 | $ 93,353 |  |

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