CONSOLIDATED STATEMENTS OF CHANGES IN MEMBERS'/SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Members' Equity	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning balance (in Shares/Units) at Sep. 30, 2019		1,527	0
Beginning balance at Sep. 30, 2019	$ 0	$ 149,383	$ 0	$ 0	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units under long-term incentive plan (in Shares/Units)		31
Purchase of common units under long-term incentive plan (in Shares/Units)		(3)
Purchase of common units under long-term incentive plan		$ (322)
Dividends on preferred units	(3,535)	(3,535)
Dividends on common units		(15,016)
Unit-based compensation expense		963
Net income (loss)	35,144	$ 35,144
Common stock issued for business combination	0
Ending balance (in Shares/Units) at Sep. 30, 2020		1,555	0
Ending balance at Sep. 30, 2020	0	$ 166,617	$ 0	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units under long-term incentive plan (in Shares/Units)		13	197
Issuance of common shares under long-term incentive plan	4,165			4,165
Purchase of common units under long-term incentive plan (in Shares/Units)		(3)
Purchase of common units under long-term incentive plan		$ (191)
Dividends on preferred units	0	(1,491)
Dividends on common units		(7,571)
Unit-based compensation expense		$ 689
Net income (loss)	(65,666)
Preferred units converted to common units (in Shares/Units)		512
Preferred units converted to common units		$ 61,196
Restricted common shares issued in exchange for common units issued under long-term incentive plan (in Shares/Units)		(24)	198
Common shares issued in exchange for common units (effected for 1-for-12 reverse stock split) (in Shares/Units)		(2,053)	16,733
Common shares issued in exchange for common units (effected for 1-for-12 reverse stock split)	192,191	$ (192,191)	$ 17	192,174
Common shares issued for business combination (in Shares)			891
Common stock issued for business combination	26,392		$ 1	26,391
Restricted common shares issued (in Shares)			3
Share-based compensation expense	1,939			1,939
Dividends declared	(10,559)				(10,559)
Common stock sold to public, net of issuance costs (in Shares)			1,667
Common stock sold to public, net of issuance costs	46,684		$ 2	46,682
Repurchased shares for tax withholding (in Shares)			(17)
Repurchased shares for tax withholding	(514)			(514)
Ending balance (in Shares/Units) at Sep. 30, 2021		0	19,672
Ending balance at Sep. 30, 2021	$ 221,690	$ 0	$ 20	$ 270,837	$ (49,167)