Summary of Significant Accounting Policies (Revenue Recognition) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Recognition period	1 month		1 month
Revenue	$ 33,447	$ 20,368	$ 100,107	$ 58,808
Ventilator rentals, non-invasive and invasive
Disaggregation of Revenue [Line Items]
Revenue from rentals under Topic 842	19,962	17,213	58,672	50,990
Other durable medical equipment rentals
Disaggregation of Revenue [Line Items]
Revenue from rentals under Topic 842	2,649	1,449	7,184	3,464
Equipment and supply sales
Disaggregation of Revenue [Line Items]
Revenue from sales and services under Topic 606	1,890	1,349	3,962	3,202
COVID-19 response sales and services
Disaggregation of Revenue [Line Items]
Revenue from sales and services under Topic 606	8,553	0	29,306	0
Service revenues
Disaggregation of Revenue [Line Items]
Revenue from sales and services under Topic 606	$ 393	$ 357	$ 983	$ 1,152