Summary of Significant Accounting Policies - Equipment and Other Fixed Assets, Impairment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Equipment and Other Fixed Assets
Impairment of equipment and other fixed assets	$ 0	$ 0
Impairment of goodwill	$ 0	$ 0
Vehicles
Equipment and Other Fixed Assets
Useful lives of property and equipment	5 years
Minimum | Patient medical equipment
Equipment and Other Fixed Assets
Useful lives of property and equipment	13 months
Minimum | Other
Equipment and Other Fixed Assets
Useful lives of property and equipment	2 years
Maximum | Patient medical equipment
Equipment and Other Fixed Assets
Useful lives of property and equipment	5 years
Maximum | Other
Equipment and Other Fixed Assets
Useful lives of property and equipment	7 years