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Shareholders' Equity - Narrative (Details) $ / shares in Units, $ in Thousands							3 Months Ended				9 Months Ended
	Oct. 13, 2022 USD ($) $ / shares	Sep. 14, 2022 $ / shares shares	Aug. 18, 2022 USD ($)	Jun. 02, 2022 trustee $ / shares shares	May 19, 2022 USD ($)	Feb. 17, 2022 USD ($)	Sep. 30, 2022 $ / shares shares	Mar. 31, 2022 shares	Sep. 30, 2021 shares	Jun. 30, 2021 shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award
Distributions to shareholders | $			$ 2,391		$ 2,390	$ 2,390					$ 7,171	$ 7,150
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award
Distributions to common shareholders declared (in dollars per share) | $ / shares	$ 0.01
Distributions to shareholders | $	$ 2,397
Common Shares
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares (in shares) | shares							122,403	1,698	94,937	13,906
Trustee | Share Award Plans | RMR
Share-based Compensation Arrangement by Share-based Payment Award
Number Of Trustees | trustee				7
Common shares awarded (in shares) | shares				20,000
Share price (in dollars per share) | $ / shares				$ 2.14
Officers And Employees | RMR
Share-based Compensation Arrangement by Share-based Payment Award
Weighted average share price (in dollars per share) | $ / shares							$ 1.30				$ 1.33
Officers And Employees | RMR | Common Shares
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares (in shares) | shares							122,403				124,101
Officers And Employees | Share Award Plans | RMR
Share-based Compensation Arrangement by Share-based Payment Award
Common shares awarded (in shares) | shares		707,000
Share price (in dollars per share) | $ / shares		$ 1.30

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