Organization and Operations - Additional Information (Detail)		1 Months Ended	3 Months Ended				12 Months Ended	24 Months Ended
	Dec. 20, 2019 AirCraft	Aug. 31, 2022 AirCraft	Dec. 31, 2022 USD ($) DailyDeparture AirCraft Employee Flighthour City Engine State	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2022 USD ($) AirCraft	Dec. 31, 2024 USD ($) AirCraft
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of states in which entity operates | State			42
Number of aircrafts operated			158
Number of cities in which entity operates | City			106
Number of daily departures | DailyDeparture			293
Number of employees | Employee			2,478
Net cash provided by operating activities | $			$ (6,034,000)			$ 4,751,000
Net loss | $			(9,090,000)			$ (14,274,000)
Intangible asset impairment | $			3,719,000
Proceeds from sale of property | $			$ 8,200,000
Number of spare engines to be sold | Engine			30
Gross proceeds from sale of asset | $			$ 80,000,000
Proceeds from sale of asset | $			26,400,000
Revolving loan | $			25,500,000
Reduction in loan amount | $			5,000,000
Upfront provided for flight time out-of-pocket expense | $			0
Short-term debt | $			$ 88,800,000
Consideration For Amended Description			In January 2023, in consideration for entering into the Amended and Restated United CPA and providing the revolving line of credit, discussed in Note 9, the Company agreed to (i) grant United the right to designate one individual (the “United Designee”) to be appointed to the Company’s board of directors, and (ii) issue to United shares of our common stock equal to ten percent (10.0%) of the Company’s issued and outstanding shares on a fully diluted basis as of the date of such issuance (the “United Shares”). United’s board designee rights will terminate at such time as United’s equity ownership in the Company falls below five percent (5.0%).
Principal maturity payments on long-term debt due within next twelve months | $			$ 88,802,000	$ 97,218,000			$ 97,218,000
United capacity purchase agreement termination notice period			30 days
RASPRO Aircraft Lease Agreement [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircraft lease terminated			15
Buyout pricing | $			$ 25,000,000
Impact of Pilot Shortage and Attrition [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net cash provided by operating activities | $			6,000,000.0
Net loss | $			$ 9,100,000
Intangible asset impairment | $					$ 3,700,000
Captains [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Increased overall hourly pay due to pilot shortage and attrition				118.00%
New Hire First Officers [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Increased overall hourly pay due to pilot shortage and attrition				172.00%
Mesa Pilot Development Program [Member] | Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Flight hours required to fly commercial aircraft | Flighthour			1,500
CRJ-700 Aircraft [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts listed for sale							18
Proceeds from sale of property | $			$ 8,000,000.0				$ 36,800,000
Number of aircraft sold							10
Number of aircraft classified as assets held for sale			8
CRJ-700 Aircraft [Member] | United Capacity Purchase Agreement [Member] | United [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts listed for sale		18
Number of aircraft sold			10
Number of aircraft to be sold			8
Aircraft lease term			9 years
Number of aircraft leased			10
CRJ-900 Aircraft [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts listed for sale			11
CRJ-900 Aircraft [Member] | Export Development Bank of Canada Agreement [Member] | Scenario Forecast [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts operated								7
Maximum liquidity provided | $								$ 14,000,000
CRJ-900 Aircraft [Member] | RASPRO Aircraft Lease Agreement [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircraft lease terminated			15
Buyout pricing | $			$ 25,000,000
CRJ-900 Aircraft [Member] | American Capacity Purchase Agreement [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts operated			42
CRJ-900 Aircraft [Member] | United Capacity Purchase Agreement [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts operated			38
CRJ-200 Aircraft [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts listed for sale			1
E-175 Aircraft [Member] | United Capacity Purchase Agreement [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts operated			60
E-175 Aircraft [Member] | United Capacity Purchase Agreement [Member] | United [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts operated			42
Number of aircrafts owned			18
Lease expiration year			2028
Notice period for termination of agreement			United, subject to certain conditions, including the payment of certain costs tied to aircraft type, may terminate the agreement in its discretion, or remove E-175 aircraft from service, by giving us notice of 90 days or more
E-175 Aircraft [Member] | United Capacity Purchase Agreement [Member] | United [Member] | Minimum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Lease expiration year			2024
E-175 Aircraft [Member] | United Capacity Purchase Agreement [Member] | United [Member] | Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Lease expiration year			2028
E175LL Aircraft [Member] | United Capacity Purchase Agreement [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts operated			20
Air crafts expiring month and year description			in 2032 and 2033
Boeing 737400F [Member] | DHL Flight Services Agreement [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts operated	3
Aircraft lease term	5 years
Number of aircraft leased	2
Notice period for termination of agreement			At any time after the first anniversary of the commencement date of the first aircraft placed in service with 90 days' written notice.
Aircraft option to extend agreement description			DHL has the option to extend the agreement with respect to one (1) or more aircraft for a period of one year with 90 days’ advance written notice.
Pipistrel Alpha Trainer 2 Aircraft [Member] | Mesa Pilot Development Program [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts purchased			29
Flight costs per hour | $			$ 25