SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Accounting Policies [Abstract]
Billings recorded from inventory builds	$ 1,000,000.0	$ 500,000
Solutions sold that were held in vendor managed inventory	$ 2,900,000		$ 2,800,000
Goodwill impairment			$ 0

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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