LEASES - NARRATIVE (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Proceeds from the sale of leased asset	$ 1,100
Gain on sale of asset		$ 1,982	$ 1,336
Gain from the reversal of the storage yard's lease liability in excess of the right-of-use-asset			$ 236

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Name:	us-gaap_GainLossOnDispositionOfAssets1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration