DISCONTINUED OPERATIONS - Balance Sheets Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Assets of discontinued operations:
Prepaid and other current assets	$ 321	$ 321
Other long-term assets	2,873	2,888
Total assets of discontinued operations	3,194	3,209
Liabilities of discontinued operations:
Accrued liabilities, current	2,450	4,333
Other long-term liabilities	3,154	3,331
Total liabilities of discontinued operations	$ 5,604	$ 7,664