Acquisitions - Additional Information (Details)			3 Months Ended
	Aug. 31, 2021 USD ($)	Mar. 01, 2021 USD ($) Location	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)
Business Acquisition [Line Items]
Total purchase consideration, net of cash acquired			$ 1,250,000
Goodwill			$ 52,463,000	$ 50,536,000	$ 50,010,000	$ 50,010,000
MedOne
Business Acquisition [Line Items]
Acquisition date	Aug. 31, 2021
Total purchase consideration	$ 2,000,000.0
Total purchase consideration, net of cash acquired	1,250,000
Escrow for potential satisfaction of certain indemnification obligations	250,000
Contingent consideration fair value	500,000
Goodwill	1,900,000
Maximum additional consideration payable	$ 1,000,000.0
MedOne | Volatility
Business Acquisition [Line Items]
Contingent consideration, fair value estimation	0.233
MedOne | Discount Rate
Business Acquisition [Line Items]
Contingent consideration, fair value estimation	0.103
AMPM
Business Acquisition [Line Items]
Acquisition date		Mar. 01, 2021
Total purchase consideration		$ 1,100,000
Total purchase consideration, net of cash acquired		400,000
Escrow for potential satisfaction of certain indemnification obligations		300,000
Contingent consideration fair value		400,000
Goodwill		700,000
Maximum additional consideration payable		$ 2,100,000
Number of respiratory products and services locations | Location		9
AMPM | Trade Names
Business Acquisition [Line Items]
Intangible assets		$ 400,000
AMPM | Volatility
Business Acquisition [Line Items]
Contingent consideration, fair value estimation		0.400	0.233
AMPM | Discount Rate
Business Acquisition [Line Items]
Contingent consideration, fair value estimation		0.103	0.103