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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |
Allowance for Doubtful Accounts Receivable, Current | $ 1,759 | $ 1,948
Depreciation | 2,223 | 1,686
Goodwill | 3,617 | 3,072
Amortization of Intangible Assets |  | 165
Research and Development Expense | 627 | 596
Debt Issuance Costs, Noncurrent, Net | 207 | 159
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net | 545 | 3,034
Other Intangible Assets [Member] |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |
Amortization of Intangible Assets | $ 6 | $ 6
Building and Building Improvements [Member] | Minimum [Member] |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |
Property, Plant and Equipment, Useful Life | 34 years |
Building and Building Improvements [Member] | Maximum [Member] |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |
Property, Plant and Equipment, Useful Life | 40 years |
Machinery and Equipment [Member] | Minimum [Member] |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |
Property, Plant and Equipment, Useful Life | 5 years |
Machinery and Equipment [Member] | Maximum [Member] |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |
Property, Plant and Equipment, Useful Life | 10 years |
Furniture and Fixtures [Member] |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |
Property, Plant and Equipment, Useful Life | 10 years |

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- Definition Amount of allowance for credit loss on accounts receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446 + Details
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