CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 14,581	$ 8,008	$ (7,868)
Unrealized loss on derivative contract	(279)	0	0
Comprehensive income (loss)	$ 14,302	$ 8,008	$ (7,868)