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REVENUE RECOGNITION (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
REVENUE RECOGNITION        
Revenues $ 22,892 $ 15,765 $ 59,529 $ 44,695
Royalty revenue        
REVENUE RECOGNITION        
Revenues $ 102 $ 131 $ 255 $ 567