INCOME TAXES - Deferred tax assets and liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Deferred tax assets:
Inventory	$ 1,009	$ 2,792
Allowance for credit losses	1,676	1,487
Domestic net operating loss carryforwards	16,343	8,813
Foreign net operating loss carryforwards	10,170	11,302
Foreign tax credit carryforwards	3,861	2,811
Capital loss carryforward	1,870	1,693
Stock compensation expense	3,017	3,059
Business Interest Limitation	19,948	10,615
Lease liabilities	12,450	9,878
Goodwill	7,739	9,468
Other	194	1,271
Total deferred tax assets	78,277	63,189
Deferred tax liabilities:
Prepaid expenses	(333)	(643)
Lease ROU assets	(12,123)	(9,511)
Accreted interest on convertible debt	(5,240)	(7,170)
Basis difference for property and equipment	(13,374)	(12,689)
Basis difference for intangible assets	(56,041)	(66,865)
Total deferred tax liabilities	(87,111)	(96,878)
Total net deferred tax liabilities	(8,834)	(33,689)
Valuation allowance for net deferred tax assets	(18,207)	(16,375)
Net deferred tax liabilities	$ (27,041)	$ (50,064)