FAIR VALUE MEASUREMENTS, Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Liabilities Measured at Fair Value [Abstract]
Contingent earnout liability, current	$ 1,054
Contingent earnout liability, noncurrent	2,546
Recurring Basis [Member] | Level 3 [Member]
Liabilities Measured at Fair Value [Abstract]
Contingent earnout liabilities	3,600	$ 0
Liabilities	$ 3,600	$ 0