COMMON STOCK EQUITY (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	12 Months Ended
	May 26, 2021	Mar. 03, 2021	Dec. 31, 2019	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)			6,545,454
Proceeds from issuance of common stock			$ 212,900	$ 14,745	$ 15,105	$ 18,080
Cash settlement of equity forward agreement				$ 0	$ 2,823	$ 0
Directly Issued Common Stock
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)			5,333,334
Forward Sales Agreements
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)			1,212,120
Conversion price per share (usd per share)			$ 40.0125
Cash settlement of equity forward agreement	$ 2,400	$ 388
Forward sales agreement, settlement (in shares)	484,848	727,272