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Revenue & Accounts Receivable Credit Concentration - Summary of Revenue and Accounts Receivable by Third-party Payors and Other Customers (Details) - Customer Concentration Risk
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Revenue      
Concentration Risk [Line Items]      
Concentration risk, percentage 58.00% 16.00%  
Revenue | The Big Ten Conference      
Concentration Risk [Line Items]      
Concentration risk, percentage 58.00%    
Revenue | Pfizer, Inc      
Concentration Risk [Line Items]      
Concentration risk, percentage   16.00%  
Accounts Receivable      
Concentration Risk [Line Items]      
Concentration risk, percentage 83.00%   59.00%
Accounts Receivable | The Big Ten Conference      
Concentration Risk [Line Items]      
Concentration risk, percentage 66.00%   35.00%
Accounts Receivable | Centura Healthcare      
Concentration Risk [Line Items]      
Concentration risk, percentage 7.00%   24.00%
Accounts Receivable | Purdue University      
Concentration Risk [Line Items]      
Concentration risk, percentage 10.00%