SEGMENT INFORMATION - Additional Information (Details)	3 Months Ended
Jan. 01, 2021 specialty_hospital segment cancer_center
Segment Reporting Information [Line Items]
Number of segments \| segment	2
Number of cancer centers \| cancer_center	13
India
Segment Reporting Information [Line Items]
Number of specialty hospitals	1
Sri Lanka
Segment Reporting Information [Line Items]
Number of cancer centers	1

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration