Stockholders' Equity - Additional Information (Detail) - USD ($)
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1 Months Ended |
3 Months Ended |
9 Months Ended |
12 Months Ended |
Aug. 03, 2017 |
Apr. 07, 2017 |
Sep. 09, 2016 |
Jun. 26, 2017 |
Mar. 31, 2017 |
Mar. 17, 2017 |
Jan. 31, 2017 |
Jan. 31, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
Dec. 31, 2016 |
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Employee Stock Purchase Plan to eligible employees, compensation expense recognized |
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$ 52,000
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$ 35,000
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$ 100,000
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$ 91,000
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| General and Administrative Expense |
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12,318,000
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7,620,000
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28,827,000
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21,202,000
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| Class of Warrant or Right, Exercise Price of Warrants or Rights |
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$ 4.02
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| Share-based Compensation |
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12,048,000
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8,792,000
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| Warrants Issued |
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6,400
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853,677
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| Stock Issued During Period, Value, Employee Stock Purchase Plan |
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$ 42,000
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| NSC 2017 Note [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Class of Warrant or Right, Exercise Price of Warrants or Rights |
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$ 3.70
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| Percentage Of Placement Agent Fee |
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10.00%
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10.00%
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| Private Placement [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Percentage Of Placement Agent Fee |
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10.00%
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| Payments of Stock Issuance Costs |
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$ 42,000,000
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| Percentage Of Shares Issued To Placement Agent |
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0.00%
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| IPO [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Stock Issued During Period, Shares, New Issues |
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6,325,000
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| Over-Allotment Option [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Stock Issued During Period, Shares, New Issues |
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825,000
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| Longterm Incentive Program [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value |
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$ 1,500,000
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$ 1,400,000
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| Capital Units, Authorized |
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100,000,000
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| Share-based Compensation |
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$ 52,000
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0
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$ 52,000
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0
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| Maximum [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Class of Warrant or Right, Exercise Price of Warrants or Rights |
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$ 4.75
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$ 4.75
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| Checkpoint [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Allocated Share-based Compensation Expense |
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$ 900,000
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800,000
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$ 4,300,000
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| Dr. Rosenwald [Member] | Longterm Incentive Program [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |
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552,698
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510,434
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| Mustang [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Stock Based compensation, authorized number of shares |
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8,536,774
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| Allocated Share-based Compensation Expense |
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$ 800,000
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$ 1,200,000
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| Mustang [Member] | Private Placement [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Class of Warrant or Right, Exercise Price of Warrants or Rights |
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$ 8.50
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$ 8.50
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| Stock Issued During Period, Value of Warrants Exercised |
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$ 65,000
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| Caelum [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Allocated Share-based Compensation Expense |
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$ 400,000
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400,000
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| Avenue Therapeutics, Inc. [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Research And Development Expense |
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200,000
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3,000,000
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200,000
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12,000,000
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| General and Administrative Expense |
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78,000,000
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3,000,000
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90,000,000
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12,000,000
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| Allocated Share-based Compensation Expense |
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$ 200,000
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5,000
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$ 300,000
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23,000
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| Shares Issued, Price Per Share |
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$ 6.00
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| Mustang Bio, Inc [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Stock Based compensation, shares available for issuance |
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215,269
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215,269
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| Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options |
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$ 2,300,000
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$ 2,300,000
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| Share Price |
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$ 5.73
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |
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200,000
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| Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price |
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$ 5.73
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| Aggregate Number of Shares of Common Stock,Percentage |
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2.50%
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| Stock Issuance Costs |
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$ 1,200,000
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| Share-based Compensation Arrangement by Share-based Payment Award, Description |
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Both grants have the following vesting schedule: 50% of the options vest over-time with 25% vesting over 12 months of continued service, with the remaining 25% vesting in 12 equal installments thereafter, subject to continued employment. The remaining 50% vest and become exercisable upon the occurrence of the following milestones being achieved: (i) 25% of the grant vest upon the dosing of the first patient in the first Phase 2 clinical trial of any Mustang product candidate, (ii) 25% of the grant vest upon the dosing of the first patient in the first Phase 2 clinical trial of a second Mustang product candidate, (iii) 25% of the grant vest upon Mustangs achievement of a fully-diluted market capitalization of $500,000,000 and (iv) 25% of the grant vest upon Mustangs achievement of a fully-diluted market capitalization of $1,000,000,000.
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |
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1 year 7 months 10 days
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| Mustang Bio, Inc [Member] | NSC 2017 Note [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Percentage Of Placement Agent Fee |
10.00%
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| Warrants Issued |
1,000
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| Mustang Bio, Inc [Member] | Private Placement [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Stock Issued During Period, Shares, Issued for Services |
10,000
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2,500
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| Proceeds from Issuance of Private Placement |
$ 65,000,000
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| Warrants Issued |
2,500
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| Mustang Bio, Inc [Member] | Chief Executive Officer [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |
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1,041,675
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| Mustang Bio, Inc [Member] | Employee [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price |
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$ 5.73
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| Journey Medical Corporation [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Allocated Share-based Compensation Expense |
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130,000
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$ 200,000
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| Journey Medical Corporation [Member] | Employee [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures |
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395,000,000
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| Checkpoint Therapeutics, Inc [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Allocated Share-based Compensation Expense |
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2,700,000
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| Share-based Compensation |
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400,000
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400,000
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$ 2,800,000
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1,600,000
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| JMC [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Allocated Share-based Compensation Expense |
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62,000
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458,000
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| Helocyte Inc [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Allocated Share-based Compensation Expense |
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27,000
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67,000
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100,000
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160,000
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| Helocyte Inc [Member] | Non-employee [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Share-based Compensation |
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20,000
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50,000
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100,000
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| Cellvation Inc [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Allocated Share-based Compensation Expense |
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5,000
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19,000
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| Cellvation Inc [Member] | Non-employee [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Share-based Compensation |
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$ 2,000
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$ 7,000
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| National Holdings Corporation [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Class of Warrant or Right, Exercise Price of Warrants or Rights |
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$ 3.25
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$ 3.25
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| National Holdings Corporation [Member] | Private Placement [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Percentage Of Placement Agent Fee |
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10.00%
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| Proceeds from Issuance of Private Placement |
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$ 400
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$ 55,500,000
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| Warrants Issued |
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2,134,193
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| Private Placement Stock Units Shares To Be Issued |
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10,000
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10,000
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| Percentage Of Shares Issued To Placement Agent |
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10.00%
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| National Holdings Corporation [Member] | Mustang Bio, Inc [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Stock Based compensation, authorized number of shares |
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64,000
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| Payments of Stock Issuance Costs |
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$ 5,500,000
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| National Holdings Corporation [Member] | Mustang Bio, Inc [Member] | Private Placement [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Class of Warrant or Right, Outstanding |
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16,000
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| Common Stock [Member] | Avenue Therapeutics, Inc. [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Proceeds from issuance of Common stock |
|
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$ 34,200,000
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| Stockholders' Equity, Reverse Stock Split |
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3-For-1
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| Research and Development Expense [Member] |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Allocated Share-based Compensation Expense |
|
|
|
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|
$ 1,600,000
|
900,000
|
4,800,000
|
3,400,000
|
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| General and Administrative Expense [Member] |
|
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
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| Allocated Share-based Compensation Expense |
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|
|
2,600,000
|
2,000,000
|
6,900,000
|
5,400,000
|
|
| General and Administrative Expense [Member] | Longterm Incentive Program [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share-based Compensation |
|
|
|
|
|
|
|
|
200,000
|
75,000
|
500,000
|
200,000
|
|
| General and Administrative Expense [Member] | Helocyte Inc [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share-based Compensation |
|
|
|
|
|
|
|
|
7,000
|
17,000
|
25,000
|
42,000
|
|
| General and Administrative Expense [Member] | Cellvation Inc [Member] | Chief Executive Officer [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share-based Compensation |
|
|
|
|
|
|
|
|
3,000
|
|
$ 11,000
|
|
|
| Restricted Stock [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |
|
|
|
|
|
|
|
|
|
|
2 years
|
|
|
| Share-based Compensation |
|
|
|
|
|
|
|
|
700,000
|
200,000
|
$ 1,700,000
|
5,600,000
|
|
| Restricted Stock [Member] | Journey Medical Corporation [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share-based Compensation |
|
|
|
|
|
|
|
|
95,000
|
|
25,000
|
|
|
| Restricted Stock [Member] | Checkpoint Therapeutics, Inc [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share-based Compensation |
|
|
|
|
|
|
|
|
$ 500,000
|
$ 300,000
|
$ 1,500,000
|
$ 1,000,000
|
|
| Restricted Stock Units (RSUs) [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |
|
|
|
|
|
|
|
|
|
|
2 years 2 months 12 days
|
|
|
| Share-based Compensation |
|
|
|
|
|
|
|
|
|
|
$ 5,600,000
|
|
|
| Employee Stock Option [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Common Stock issued in connection with the first ESPP offering |
|
|
|
|
|
|
|
|
|
|
22,000
|
|
|
| Common Stock, Capital Shares Reserved for Future Issuance |
|
|
|
|
|
|
|
|
205,000
|
|
205,000
|
|
|
| Stock Issued During Period, Value, Employee Stock Purchase Plan |
|
|
|
|
|
|
|
|
|
|
$ 41,900
|
|
|
| Employee Stock Option [Member] | Maximum [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Common Stock issued in connection with the first ESPP offering |
|
|
|
|
|
|
|
|
|
|
199,995
|
|
|
| Employee Stock Option [Member] | Journey Medical Corporation [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share-based Compensation |
|
|
|
|
|
|
|
|
$ 8,000
|
|
$ 29,000
|
|
|