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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Oct. 01, 2019 | Sep. 30, 2018
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |
Total revenue recognized | $ 60,469 | $ 43,616 |  |
Allowance for Doubtful Accounts Receivable, Current | 561 | 1,759 |  |
Depreciation | 3,126 | 2,223 |  |
Goodwill | 4,368 | 3,617 |  |
Total amount of intangible assets subject to amortization | 4,261 | 2,883 |  | $ 3,334
Amortization of Intangible Assets | 703 | 451 |  |
Research and Development Expense | 950 | 627 |  |
Debt Issuance Costs, Noncurrent, Net | 235 | 207 |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net | 751 |  |  |
Finance right-of-use assets | 4,778 | 0 |  |
Finance lease liability | 4,772 |  |  |
Operating right-of -use asset | 4,001 | 0 |  |
Operating lease liability | 4,210 |  |  |
Straight-line rent per month | 53 |  |  |
Variance between the straight-line rents recognized and the actual cash rents received | $ 0 |  |  |
Restatement | Accounting Standards Update 2016-02 [Member] |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |
Finance right-of-use assets |  |  | $ 4,628 |
Finance lease liability |  |  | 4,650 |
Operating right-of -use asset |  |  | 4,581 |
Operating lease liability |  |  | $ 4,687 |
Building and Building Improvements [Member] | Minimum |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |
Property, Plant and Equipment, Useful Life | 34 years |  |  |
Building and Building Improvements [Member] | Maximum |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |
Property, Plant and Equipment, Useful Life | 40 years |  |  |
Machinery and Equipment [Member] | Minimum |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |
Property, Plant and Equipment, Useful Life | 5 years |  |  |
Machinery and Equipment [Member] | Maximum |  |  |  |
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 |  |  |
Royalty revenue [Member] |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |
Total revenue recognized | $ 641 | $ 349 |  |

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