General form of registration statement for all companies including face-amount certificate companies

Significant Accounting Policies - Concentration of revenue (Details)

v3.21.4
Significant Accounting Policies - Concentration of revenue (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
Concentration Risk [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              
Concentration Risk [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%
Health Plan A | Revenue | Customer Concentration              
Concentration Risk [Line Items]              
Total Revenue by Year $ 36,417,184 $ 35,838,768 $ 114,230,860 $ 107,265,350 $ 142,268,775    
Percentage of total revenue 23.00% 28.00% 25.00% 31.00% 29.00%    
Health Plan B | Revenue | Customer Concentration              
Concentration Risk [Line Items]              
Total Revenue by Year $ 38,227,530 $ 27,666,559 $ 105,261,569 $ 80,813,324 $ 113,116,297 $ 13,557,771  
Percentage of total revenue 24.00% 21.00% 23.00% 22.00% 23.00% 9.00%  
Health Plan C | Revenue | Customer Concentration              
Concentration Risk [Line Items]              
Total Revenue by Year $ 29,563,741 $ 16,638,058 $ 84,489,621 $ 47,061,035 $ 66,237,074 $ 27,788,287  
Percentage of total revenue 19.00% 13.00% 18.00% 13.00% 14.00% 19.00%  
Health Plan D | Revenue | Customer Concentration              
Concentration Risk [Line Items]              
Total Revenue by Year $ 18,913,641 $ 21,599,026 $ 56,606,725 $ 48,750,247 $ 62,683,829 $ 6,106,544  
Percentage of total revenue 12.00% 17.00% 12.00% 14.00% 13.00% 4.00%  
Health Plan E | Revenue | Customer Concentration              
Concentration Risk [Line Items]              
Total Revenue by Year         $ 28,128,820 $ 39,265,322 $ 87,696,695
Percentage of total revenue         6.00% 27.00% 100.00%
Health Plan F | Revenue | Customer Concentration              
Concentration Risk [Line Items]              
Total Revenue by Year         $ 24,521,349 $ 26,703,364  
Percentage of total revenue         5.00% 18.00%  
Health Plan G | Revenue | Customer Concentration              
Concentration Risk [Line Items]              
Total Revenue by Year         $ 22,646,251 $ 20,157,166  
Percentage of total revenue         5.00% 14.00%  
All Other | Revenue | Customer Concentration              
Concentration Risk [Line Items]              
Total Revenue by Year $ 33,398,159 $ 27,098,580 $ 98,914,457 $ 76,774,323 $ 25,938,894 $ 12,316,378  
Percentage of total revenue 21.00% 21.00% 22.00% 20.00% 5.00% 8.00%