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Significant Accounting Policies - Revenue Recognition (Details)

v3.21.4
Significant Accounting Policies - Revenue Recognition (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disaggregation of Revenue [Line Items]              
Total Revenue by Year $ 156,520,255 $ 128,840,991 $ 459,503,232 $ 360,664,280 $ 485,541,291 $ 145,894,832 $ 87,696,695
Revenue | Customer Concentration              
Disaggregation of Revenue [Line Items]              
Total Revenue by Year $ 156,520,255 $ 128,840,991 $ 459,503,232 $ 360,664,280 $ 485,541,291 $ 145,894,832 $ 87,696,695
Percentage of total revenue 100.00% 100.00% 100.00% 100.00% 100.00% 100.00% 100.00%
Capitated Revenue              
Disaggregation of Revenue [Line Items]              
Total Revenue by Year $ 152,276,992 $ 124,461,275 $ 447,137,121 $ 351,018,290 $ 471,551,241 $ 138,727,943 $ 86,465,658
Capitated Revenue | Revenue | Customer Concentration              
Disaggregation of Revenue [Line Items]              
Percentage of total revenue 97.00% 97.00% 97.00% 97.00%      
Subtotal Other Patient Service Revenue              
Disaggregation of Revenue [Line Items]              
Total Revenue by Year $ 4,243,263 $ 4,379,716 $ 12,366,111 $ 9,645,990 $ 13,990,050 $ 7,166,889 $ 1,231,037
Subtotal Other Patient Service Revenue | Revenue | Customer Concentration              
Disaggregation of Revenue [Line Items]              
Percentage of total revenue 3.00% 3.00% 3.00% 3.00% 3.00% 5.00% 1.00%
Clinical Fees & Insurance Revenue              
Disaggregation of Revenue [Line Items]              
Total Revenue by Year $ 2,408,642 $ 1,947,109 $ 7,280,789 $ 4,895,956 $ 7,030,606 $ 4,329,591 $ 639,636
Clinical Fees & Insurance Revenue | Revenue | Customer Concentration              
Disaggregation of Revenue [Line Items]              
Percentage of total revenue 2.00% 2.00% 2.00% 1.00% 1.00% 3.00% 1.00%
Shared Risk Revenue              
Disaggregation of Revenue [Line Items]              
Total Revenue by Year $ 139,331 $ 416,765 $ 341,342 $ 416,765 $ 1,111,466 $ 932,301 $ 200,801
Shared Risk Revenue | Revenue | Customer Concentration              
Disaggregation of Revenue [Line Items]              
Percentage of total revenue         0.00% 1.00% 0.00%
Care Coordination / Management Fees              
Disaggregation of Revenue [Line Items]              
Total Revenue by Year $ 1,146,355 $ 1,115,895 $ 2,994,755 $ 2,312,840 $ 5,614,539 $ 1,893,553 $ 390,600
Care Coordination / Management Fees | Revenue | Customer Concentration              
Disaggregation of Revenue [Line Items]              
Percentage of total revenue 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 0.00%
Incentive Fees              
Disaggregation of Revenue [Line Items]              
Total Revenue by Year $ 548,935 $ 899,946 $ 1,749,225 $ 2,020,429 $ 233,439 $ 11,444  
Incentive Fees | Revenue | Customer Concentration              
Disaggregation of Revenue [Line Items]              
Percentage of total revenue   1.00%   1.00% 0.00% 0.00%