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INCOME TAXES - Income Taxes Computed Using Federal Income Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Amount computed using statutory rate									$ (2,172)	$ (756)	$ (1,849)
Net change in valuation allowance for net deferred tax assets									292	(1,702)	(19)
Other									(477)	1,605	0
Foreign rate differential									504	268	13
Non-deductible items									(14)	(64)	(141)
Transaction costs									0	(411)	0
State income tax									(100)	251	(276)
Research and development credits									791	1,166	1,248
Foreign income tax									0	0	(15)
Contingent consideration									(432)	285	0
Uncertain tax positions									(184)	(318)	0
Stock compensation, net									(522)	(232)	215
Total tax benefit (expense)	$ 2,123	$ (783)	$ (1,808)	$ (1,846)	$ (976)	$ 880	$ 20	$ 168	$ (2,314)	$ 92	$ (824)

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