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COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS (Narrative) (Details) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 USD ($) | Sep. 30, 2017 USD ($) | Dec. 01, 2013 USD ($) ft²
Other Commitments [Line Items] |  |  |
Area of Land | ft² |  |  | 198,000
Percentage Of Building Area Agreed To Lease From Landlord |  |  | 70.00%
Lessee Leasing Arrangements, Operating Leases, Term of Contract | 10 years |  |
Period Of Warranty For Manufacturing Defects | 1 year |  |
Lease Expiration Year | 2023 |  |
Financing obligation | $ | $ 16,257 | $ 16,074 | $ 20,000
Building [Member] |  |  |
Other Commitments [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 25 years |  |

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- Definition Present value of minimum lease payments for sale-leaseback transactions accounted for using the deposit method or as a financing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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