Joint Venture - Summary of Financial Information of Joint Ventures (Operations Data) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Schedule Of Equity Method Investments [Line Items]
Revenue	$ 107,238		$ 114,760		$ 211,130		$ 211,253
Gross profit	35,902		42,967		75,395		77,564
Net income (loss)	$ (9,621)	$ (2,969)	$ (1,874)	$ (5,449)	$ (12,590)		$ (7,323)
CNNC Accuray (Tianjin) Medical Technology Co. Ltd.
Schedule Of Equity Method Investments [Line Items]
Revenue		22,457		23,983		$ 54,312		$ 50,723
Gross profit		2,800		3,719		8,613		8,315
Net income (loss)		(872)		(1,416)		7		(2,168)
Net income (loss) attributable to the Company		$ (427)		$ (699)		$ 4		$ (1,067)