Mustang Bio, Inc. Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Stockholders' Equity (Restricted Stock or Restricted Units Awards) (Details)

v3.25.3

Stockholders' Equity (Restricted Stock or Restricted Units Awards) (Details)	9 Months Ended
	Sep. 30, 2025 USD ($) $ / shares shares
Restricted stock award
Restricted stock and RSU rollforward
Nonvested, Number, Beginning Balance \| shares	1,195
Vested \| shares	(475)
Nonvested, Number, Ending Balance \| shares	720
Weighted Average Grant Date Fair Value
Nonvested, Beginning Balance \| $ / shares	$ 415.95
Vested \| $ / shares	523.5
Nonvested, Ending Balance \| $ / shares	$ 345
Unrecognized share-based compensation \| $	$ 100,000
Weighted average vesting period (in years)	1 year
Restricted stock units
Restricted stock and RSU rollforward
Nonvested, Number, Beginning Balance \| shares	226
Forfeited \| shares	(12)
Vested \| shares	(118)
Nonvested, Number, Ending Balance \| shares	96
Weighted Average Grant Date Fair Value
Nonvested, Beginning Balance \| $ / shares	$ 746.7
Forfeited \| $ / shares	1,321.25
Vested \| $ / shares	1,042.9
Nonvested, Ending Balance \| $ / shares	$ 310.81
Unrecognized share-based compensation \| $	$ 6,000
Weighted average vesting period (in years)	1 year 3 months 18 days

- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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