Net Income (Loss) per Share - Tabular Disclosure (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]
Loss from continuing operations	$ (12,883)	$ (11,286)	$ (28,869)
Income (loss) from discontinued operations, net of tax	(1,374)	2,144,145	139,616
Net Income (Loss)	(14,257)	2,132,859	110,747
Net (loss) income - basic	(14,257)	2,132,859	110,747
Net (loss) income - diluted	$ (14,257)	$ 2,132,859	$ 110,747
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted average common shares outstanding used in computing basic (loss) income per share (in shares)	66,253	74,897	74,229
Dilutive restricted stock units (in shares)			226
Weighted average common shares outstanding used in computing diluted (loss) income per share (in shares)	66,253	74,897	74,455
Earnings Per Share, Basic [Abstract]
Loss from continuing operations (in dollars per share)	$ (0.19)	$ (0.15)	$ (0.39)
Income (loss) from discontinued operations, net of tax in Basic (in dollars per share)	(0.02)	28.63	1.88
Basic Net (loss) income per share (in dollars per share)	(0.22)	28.48	1.49
Earnings Per Share, Diluted [Abstract]
Income (loss) from continuing operations in diluted (in dollars per share)	(0.19)	(0.15)	(0.39)
Income (loss) from discontinued operations, net of tax in diluted (in dollars per share)	(0.02)	28.63	1.88
Diluted Net (loss) income per share (in dollars per share)	$ (0.22)	$ 28.48	$ 1.49