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INCOME TAXES - Income Taxes Computed Using Federal Income Tax Rate (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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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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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 35 -Paragraph 2 -SubTopic 740 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480887/718-740-35-2 + Details
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