XML 68 R53.htm IDEA: XBRL DOCUMENT v3.21.2

Subsequent Events - Additional Information (Detail) - Forward Purchase Contract [Member] - Heart Aerospace Incorporated [Member] - Subsequent Event [Member] $ in Millions	1 Months Ended
	Jul. 31, 2021 USD ($) Air-craft
Aircraft Purchase Agreement [Member]
Subsequent Event [Line Items]
Number of aircraft purchased	100
Number of additional aircrafts	50
Preferred Stock [Member] | Series A Preferred Stock Purchase Agreement [Member]
Subsequent Event [Line Items]
Purchase of preferred stock | $	$ 5.0

X

- Definition

Number of additional aircraft.

+ References

No definition available.

+ Details

Name:	mesa_NumberOfAdditionalAircraft
Namespace Prefix:	mesa_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of aircraft purchased.

+ References

No definition available.

+ Details

Name:	mesa_NumberOfAircraftPurchased
Namespace Prefix:	mesa_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Value of shares of stock issued during the period as part of a transaction to acquire assets that do not qualify as a business combination.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValuePurchaseOfAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=mesa_ForwardPurchaseContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=mesa_HeartAerospaceIncorporatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=mesa_AircraftPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_PreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=mesa_SeriesAPreferredStockPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: