Joint Venture - Summary of Financial Information of Joint Ventures (Operations Data) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Total net revenue	$ 96,169			$ 102,562			$ 319,886		$ 285,353
Gross Profit	34,784			39,542			116,935		115,776
Net income	$ (1,046)	$ 179	$ (1,028)	$ (390)	$ 4,769	$ 402	$ (1,895)		$ 4,781
CNNC Accuray (Tianjin) Medical Technology Co. Ltd.
Schedule Of Equity Method Investments [Line Items]
Total net revenue								$ 44,819		$ 28,095
Gross Profit								13,590		8,864
Net income								1,511		2,089
Net income attributable to the Company								$ 740		$ 1,021