SEGMENT AND GEOGRAPHIC INFORMATION - Narrative (Details) $ in Thousands	12 Months Ended
Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)
SEGMENT INFORMATION
Number of segments \| segment	2
Revenue	$ 572,425	$ 547,656
Non-cash amortization of inventory fair value step-up	679	10,246
Goodwill impairment loss	66,367	236,005
Stock based compensation expense, non-cash	7,844	24,202
Gain (loss) on fair value remeasurement	0	(56,714)
RMS
SEGMENT INFORMATION
Goodwill impairment loss	66,367	236,005
Product
SEGMENT INFORMATION
Revenue	348,612	344,678
Product \| DSA
SEGMENT INFORMATION
Revenue	4,742	4,176
Intersegment Eliminations
SEGMENT INFORMATION
Revenue	$ 8,793	$ 7,250

The amount of gain (loss) on fair value remeasurement of convertible senior notes.

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The non-cash amortization of inventory fair value step-up.

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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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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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