Summary of Significant Accounting Policies (Revenue Recognition) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Recognition period	1 month		1 month
Revenue	$ 42,854	$ 20,325	$ 66,660	$ 38,440
Ventilator rentals, non-invasive and invasive
Disaggregation of Revenue [Line Items]
Revenue from rentals under Topic 842	19,918	17,573	38,710	33,777
Other durable medical equipment rentals
Disaggregation of Revenue [Line Items]
Revenue from rentals under Topic 842	2,404	1,218	4,535	2,015
Equipment and supply sales
Disaggregation of Revenue [Line Items]
Revenue from sales and services under Topic 606	540	1,075	2,072	1,853
COVID-19 response sales
Disaggregation of Revenue [Line Items]
Revenue from sales and services under Topic 606	19,712	0	20,753	0
Service revenues
Disaggregation of Revenue [Line Items]
Revenue from sales and services under Topic 606	$ 280	$ 459	$ 590	$ 795