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Summary of Significant Accounting Policies - Revenue by Major Payers (Details) - Customer Concentration Risk | 3 Months Ended | 6 Months Ended | 12 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Medicare Advantage | Revenue Benchmark |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue | 23.00% | 13.00% | 19.00% | 12.00% |
Medicare Advantage | Accounts Receivable, Net |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  |  | 11.00% |  |
Medicare | Revenue Benchmark |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue | 19.00% | 19.00% | 20.00% | 19.00% |
Medicare | Accounts Receivable, Net |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  |  | 13.00% |  |
Aetna | Revenue Benchmark |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue | 11.00% |  |  |  |
Aetna | Accounts Receivable, Net |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  |  | 10.00% |  |
Blue Shield | Revenue Benchmark |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  | 11.00% |  | 11.00% |
Blue Shield | Accounts Receivable, Net |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  |  |  |  | 19.00%
United Healthcare | Accounts Receivable, Net |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  |  | 13.00% |  | 18.00%

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