DISCONTINUED OPERATIONS - Balance Sheets Information of Installation Services and Other Discontinued Activities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Assets of discontinued operations:
Prepaid and other current assets	$ 497	$ 605
Other long-term assets	3,194	3,424
Total assets of discontinued operations	3,691	4,029
Liabilities of discontinued operations:
Accrued liabilities, current	3,312	3,280
Other long-term liabilities	4,406	3,794
Total liabilities of discontinued operations	$ 7,718	$ 7,074