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DEBT AND OTHER OBLIGATIONS (Narrative) (Details) |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 21, 2016 USD ($) | Sep. 30, 2017 USD ($) renewal_option | Oct. 01, 2016 USD ($) | Dec. 01, 2013 USD ($) ft² | Nov. 22, 2013 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Area of Land | ft² |  |  |  | 198,000 |
Percentage Of Building Area Agreed To Lease From Landlord |  |  |  | 70.00% |
Financing obligation |  | $ 16,074,000 | $ 16,701,000 | $ 20,000,000 |
K&S Corporate Headquarters [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Lessee Leasing Arrangements, Capital Leases, Renewal Term |  | 10 years |  |  |
Annual Rent and Service Charge Minimum Range |  | $ 4,000,000 |  |  |
Annual Rent and Service Charge Maximum Range |  | $ 5,000,000 |  |  |
Lessee Leasing Arrangements, Capital Leases, Term of Contract |  | 10 years |  |  |
Lessee Leasing Arrangements, Capital Leases, Number of Renewal Options | renewal_option |  | 2 |  |  |
Capital Lease Obligations, Interest Rate, Effective Percentage |  | 6.30% |  |  |
Building [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Property, Plant and Equipment, Useful Life |  | 25 years |  |  |
Citibank [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  | $ 5,000,000
Long-term Line of Credit |  | $ 3,200,000 |  |  |
Revolving Credit Facility [Member] | United Overseas Bank Limited [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of Credit Facility, Expiration Date | Mar. 20, 2018 |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 25,000,000 |  |  |  |
Line of Credit Facility, Expiration Period | 1 year |  |  |  |
Long-term Line of Credit |  | 0 |  |  |
Current and Noncurrent Portion [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Financing obligation |  | $ 16,800,000 |  |  |

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