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COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS (Significant customer concentrations as a percentage of total accounts receivable) (Details) | 12 Months Ended
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Sep. 30, 2017 | Oct. 01, 2016
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Haoseng Industrial Co., Ltd [Member] |  |
Concentration Risk [Line Items] |  |
Customer concentrations risk percentage | 26.20% | 20.80%

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