Earnings per Share - Tabular Disclosure (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net income
Loss from continuing operations	$ (7,015)	$ (1,842)	$ (5,973)	$ (6,472)
(Loss) income from discontinued operations, net of tax	(2,555)	41,008	2,159,597	95,414
Net (loss) income	(9,570)	39,166	2,153,624	88,942
Net (loss) income - basic	(9,570)	39,166	2,153,624	88,942
Net (loss) income - diluted	$ (9,570)	$ 39,166	$ 2,153,624	$ 88,942
Weighted average common shares outstanding used in computing diluted earnings per share
Weighted average common shares outstanding used in computing basic earnings per share (in shares)	74,989	74,296	74,879	74,195
Weighted average common shares outstanding used in computing diluted earnings per share (in shares)	74,989	74,296	74,879	74,195
Basic net income per share:
Loss from continuing operations (in dollars per share)	$ (0.09)	$ (0.02)	$ (0.08)	$ (0.09)
(Loss) income from discontinued operations, net of tax (in dollars per share)	(0.03)	0.55	28.84	1.29
Basic net (loss) income per share (in dollars per share)	(0.13)	0.53	28.76	1.20
Diluted net (loss) income per share:
Loss from continuing operations (in dollars per share)	(0.09)	(0.02)	(0.08)	(0.09)
(Loss) income from discontinued operations, net of tax (in dollars per share)	(0.03)	0.55	28.84	1.29
Diluted net (loss) income per share (in dollars per share)	$ (0.13)	$ 0.53	$ 28.76	$ 1.20