Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - Healthcare - Accounts Receivable - Payor Concentration Risk - Medicare - customer	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Concentrations of credit risk
Number of Major Customers	1
Concentration Risk, Percentage	22.00%	15.00%	21.00%