INCOME TAXES - Deferred tax assets and liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Deferred tax assets:
Inventory	$ 2,792	$ 1,461
Allowance for credit losses	1,487	1,288
Accrued compensation and vacation	515	2,574
Domestic net operating loss carryforwards	8,813	8,837
Foreign net operating loss carryforwards	11,302	8,276
Foreign tax credit carryforwards	2,811	769
Unrealized foreign exchange	400	1,191
Capital loss carryforward	1,693	0
Stock compensation expense	3,059	2,999
Business Interest Limitation	10,615	3,137
Lease liabilities	9,878	9,071
Goodwill	9,468	0
Other	356	608
Total deferred tax assets	63,189	40,211
Deferred tax liabilities:
Prepaid expenses	(643)	(483)
Lease ROU assets	(9,511)	(8,941)
Accreted interest on convertible debt	(7,170)	(8,586)
Basis difference for property and equipment	(12,689)	(12,300)
Basis difference for intangible assets	(66,865)	(76,307)
Goodwill	0	(267)
Total deferred tax liabilities	(96,878)	(106,884)
Total net deferred tax liabilities	(33,689)	(66,673)
Valuation allowance for net deferred tax assets	(16,375)	(10,354)
Net deferred tax liabilities	$ (50,064)	$ (77,027)