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COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS (Significant customer concentrations as a percentage of net revenue) (Details) - Customer Concentration Risk [Member]		3 Months Ended
		Dec. 29, 2018	Dec. 30, 2017
Micron Technology, Inc [Member] [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer concentrations risk percentage		18.50%
Haoseng Industrial Co., Ltd [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer concentrations risk percentage	[1]		10.90%
Tesla, Inc. [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer concentrations risk percentage			10.90%
[1] Distributor of the Company's products.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

+ References

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