SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of Risk (Details) - Canon Medical Systems Corporation - Customer Concentration Risk	12 Months Ended
Oct. 01, 2021	Oct. 02, 2020	Sep. 27, 2019
Sales Revenue, Net
Concentration Risk [Line Items]
Concentration risk, percentage	17.90%	20.50%	17.30%
Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	16.20%	12.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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