Leases - Summary of Operating Lease Income and Other Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating leases:
Operating lease income	$ 2,454	$ 1,965
Variable lease income	435	178
Total rental income	$ 2,889	$ 2,143
Operating Lease Income Comprehensive Income Extensible List Not Disclosed Flag	true	true