Organization and Summary of Significant Accounting Policies - Patient Care (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($)
Organization and Summary of Significant Accounting Policies
Warranty liability | $	$ 2.5	$ 2.1
Patient Care
Organization and Summary of Significant Accounting Policies
Labor warranty (in days)	90 days
Manufacturer warranty (in days)	180 days
Number of performance obligations | item	2
Period of recognition deferred revenue (in days)	90 days