XML 64 R39.htm IDEA: XBRL DOCUMENT
v3.25.2

Summary of Significant Accounting Policies - Summary of Deferred Revenue Recognition (Details) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2024 USD ($)
Deferred Revenue [Abstract] |
Deferred revenue as of September 30, 2023 | $ 21,047
Fixed revenue deferrals | 3,633
Pass-through revenue deferrals | 2,002
Previously deferred fixed revenue recognized | (12,653)
Previously deferred pass-through revenue recognized | (4,390)
Deferred revenue as of September 30, 2024 | $ 9,639

X
- Definition Fixed revenue deferrals. + References No definition available. + Details
Name: | mesa_FixedRevenueDeferrals
Namespace Prefix: | mesa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Pass through revenue deferrals. + References No definition available. + Details
Name: | mesa_PassThroughRevenueDeferrals
Namespace Prefix: | mesa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Previously deferred fixed revenue recognized. + References No definition available. + Details
Name: | mesa_PreviouslyDeferredFixedRevenueRecognized
Namespace Prefix: | mesa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Previously deferred pass through revenue recognized. + References No definition available. + Details
Name: | mesa_PreviouslyDeferredPassThroughRevenueRecognized
Namespace Prefix: | mesa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of deferred income excluding obligation to transfer product and service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479432/944-30-50-2B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480016/944-40-65-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 25 -Paragraph 2 -SubTopic 10 -Topic 470 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481174/470-10-25-2 + Details
Name: | us-gaap_DeferredIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DeferredRevenueAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration