2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Net Investment Income [Line Items]
Derivative asset	$ 1,741	$ 2,956
Amount
Net Investment Income [Line Items]
Derivative asset	1,741	2,956
Investment in debt security	668	610
Contingent cash consideration	2,000
Total	4,409	3,566
Level 1
Net Investment Income [Line Items]
Derivative asset	0	0
Investment in debt security	0	0
Contingent cash consideration	2,000
Total	2,000	0
Level 2
Net Investment Income [Line Items]
Derivative asset	0	0
Investment in debt security	0	0
Contingent cash consideration	0
Total	0	0
Level 3
Net Investment Income [Line Items]
Derivative asset	1,741	2,956
Investment in debt security	668	610
Contingent cash consideration	0
Total	$ 2,409	$ 3,566