Revenue - Summary of Major Source of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Total rental revenue									$ 20,183	$ 21,449
Total revenues	$ 16,322	$ 13,845	$ 15,303	$ 15,383	$ 14,656	$ 14,960	$ 15,280	$ 14,098	60,853	58,994
Investment Management
Disaggregation Of Revenue [Line Items]
Total product and services revenue									3,210	3,332
Investment Management | Management Fees
Disaggregation Of Revenue [Line Items]
Total product and services revenue									2,652	2,793
Investment Management | Administration Fees
Disaggregation Of Revenue [Line Items]
Total product and services revenue									558	539
Durable Medical Equipment | Equipment Sales
Disaggregation Of Revenue [Line Items]
Total product and services revenue									32,293	28,934
Durable Medical Equipment | Service Revenues
Disaggregation Of Revenue [Line Items]
Total product and services revenue									5,167	5,279
Durable Medical Equipment | Sales and Services
Disaggregation Of Revenue [Line Items]
Total product and services revenue									37,460	34,213
Durable Medical Equipment | Medical Equipment
Disaggregation Of Revenue [Line Items]
Total rental revenue									20,183	21,449
Investment Management and Durable Medical Equipment
Disaggregation Of Revenue [Line Items]
Total product and services revenue									$ 40,670	$ 37,545