Balance Sheet Components - Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Balance Sheet Components
Reserves for refunds to insurance carriers	$ 18,948	$ 17,210	$ 17,366
Accrued charges for third-party testing	17,036	5,849
Testing and laboratory materials from suppliers	13,281	3,799
Marketing and corporate affairs	8,943	7,853
Legal, audit and consulting fees	36,710	11,758
Accrued shipping charges	485	969
Sales and income tax payable	4,319	2,230
Accrued third-party service fees	6,631	13,442
Clinical trials and studies	23,301	11,218
Operating lease liabilities, current portion	7,639	5,752
Property and equipment purchases	1,821	1,853
Other accrued interest	1,078	1,078
Other accrued expenses	4,022	10,342
Total other accrued liabilities	$ 144,214	$ 93,353
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Total other accrued liabilities	Total other accrued liabilities