Fixed Assets - Summary of Property and Equipment and Equipment Held for Rental (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022
Property Plant And Equipment [Line Items]
Property and Equipment, Gross Carrying Amount	$ 3,023	$ 2,958
Accumulated depreciation	(2,520)	(2,420)
Net carrying amount	503	538
Medical equipment held for rental	17,544	16,593
Accumulated depreciation	(9,621)	(9,089)
Net carrying amount	7,923	7,504
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and Equipment, Gross Carrying Amount	981	970
Vehicles
Property Plant And Equipment [Line Items]
Property and Equipment, Gross Carrying Amount	162	162
Computer Equipment And Software
Property Plant And Equipment [Line Items]
Property and Equipment, Gross Carrying Amount	716	642
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and Equipment, Gross Carrying Amount	570	590
Sleep Study Equipment
Property Plant And Equipment [Line Items]
Property and Equipment, Gross Carrying Amount	$ 594	$ 594