REVENUE FROM CONTRACTS WITH CUSTOMERS - CONTRACT BALANCES (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Accounts receivables from contracts with customers	$ 1,753	$ 1,772
Contract assets	810	413
Contract liabilities	$ 184	$ 1,097

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant