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Earnings Per Share - Calculations of Net Loss Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share And Equity [Abstract]
Net loss	$ (35,122)	$ (9,090)	$ (42,783)	$ (14,274)	$ (44,211)	$ (57,057)
Basic weighted average common shares outstanding	39,932		36,048		38,135	36,005
Diluted weighted average common shares outstanding	39,932		36,048		38,135	36,005
Net loss per share attributable to common shareholders
Basic	$ (0.88)		$ (1.19)		$ (1.16)	$ (1.58)
Diluted	$ (0.88)		$ (1.19)		$ (1.16)	$ (1.58)

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Earnings per share and equity.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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X

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e1448-109256

+ Details

Name:	us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration