SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details) - USD ($) $ in Thousands	12 Months Ended
	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