Mustang Bio, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 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 (Stock Option Activities) (Details)

v3.21.2

Stockholders' Equity (Stock Option Activities) (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Weighted Average Exercise Price
Unrecognized compensation recognition period	1 year 10 months 24 days
Stock Options [Member]
Options rollforward
Stock Options, Outstanding, Number, Beginning Balance	1,141,675
Options, Outstanding, Number, Ending Balance	1,141,675	1,141,675
Options vested and exercisable	713,547
Weighted Average Exercise Price
Weighted Average Exercise Price, Beginning	$ 5.73
Weighted Average Exercise Price, Ending	5.73	$ 5.73
Weighted Average Exercise Price, options vested and exercisable	$ 5.73
Weighted Average Remaining Contractual Life, Options outstanding (in years)	5 years 6 months 21 days	6 years 3 months 21 days
Weighted Average Remaining Contractual Life, Options vested and exercisable (in years)	5 years 6 months 21 days
Unrecognized share-based compensation	$ 12,000.0
Unrecognized compensation recognition period	1 month 6 days

- Definition

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

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options outstanding, including both vested and non-vested options.

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