DISCONTINUED OPERATIONS - Balance Sheets Information (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other long-term assets	$ 6,406	$ 2,888
Total assets of discontinued operations	8,497	3,209
Other long-term liabilities	7,014	3,331
Discontinued and Disposed Groups | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Prepaid and other current assets	2,091	321
Other long-term assets	6,406	2,888
Total assets of discontinued operations	8,497	3,209
Accrued liabilities	3,797	4,333
Other long-term liabilities	7,014	3,331
Total liabilities of discontinued operations	$ 10,811	$ 7,664