Stockholders' Equity - Additional Information (Detail)

v3.6.0.2

Stockholders' Equity - Additional Information (Detail) - USD ($)				1 Months Ended																3 Months Ended			12 Months Ended
	Jul. 15, 2015	Jun. 01, 2015	Jun. 02, 2014	Dec. 01, 2016	Oct. 31, 2016	Jun. 01, 2016	May 31, 2016	Mar. 31, 2016	Mar. 30, 2016	Feb. 29, 2016	Feb. 23, 2016	Jan. 02, 2016	Dec. 02, 2015	Oct. 30, 2015	Sep. 18, 2015	Jul. 28, 2015	Dec. 01, 2014	Feb. 28, 2014	Jun. 30, 2013	Dec. 31, 2016	Sep. 30, 2016	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Oct. 19, 2015	Jun. 02, 2015	Dec. 02, 2014	Mar. 17, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Based compensation, Options Contractual term																							10 years
Stock-based compensation weighted-average vesting period																							2 years 2 months 12 days
Employee Stock Purchase Plan to eligible employees, Reckoning fair value percentage during offering period				85.00%		85.00%														85.00%			85.00%
Employee Stock Purchase Plan to eligible employees, compensation expense recognized																							$ 0.1	$ 45,000	$ 25,000
Common Stock issued in connection with the first ESPP offering				52,769		33,958
Share Based Compensation Restricted Stock Units																							$ 9,900,000	$ 6,900,000	4,000,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition																							2 years 2 months 12 days
Common Stock Par Or Stated Value Per Share				$ 2.03		$ 2.40														$ 0.001			$ 0.001	$ 0.001
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value																									11,600,000
Share Price				$ 2.39		$ 2.82
Research And Development Expense																							$ (35,134,000)	$ (29,810,000)
General and Administrative Expense																							$ (28,229,000)	(18,734,000)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																				9,978,201			9,978,201
Proceeds from Stock Options Exercised																							$ 0	216,000	596,000
Class of Warrant or Right, Exercise Price of Warrants or Rights															$ 7.00					$ 2,500			$ 2,500
Stock Issued During Period, Shares, Issued for Services											10,000
Stock Issued During Period, Value, Issued for Services																							$ 2,000	1,000	4,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	50,000																					1,500,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																				7.00			7.00
Proceeds from issuance of Common stock																							$ 0	0	3,502,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options																				$ 4,100,000			$ 4,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized																							7,700,000
Share-based Compensation																							$ 12,128,000	14,291,000	5,546,000
Percentage Of Placement Agent Fee																							10.00%
Proceeds from Issuance of Warrants																							$ (793,000)	(613,000)
Net Proceeds From Issuance Of Warrants																							$ 51,500,000
Stock Issued For Exercise Of Warrants																							10,000
Warrant Purchase Price Per Unit																							$ 50,000
Stock Issued During Period Shares warrants Exercised															2,500
Stock Issued During Period, Shares, New Issues															10,000
Stock Issued During Period, Value of Warrants Excercised															$ 50,000
Equity Method Investment, Ownership Percentage																													35.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period																							1,950,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period																							366,666
Warrants Issued														139,592
Stock Issued During Period, Value, New Issues																							$ 53,000,000
Payments of Stock Issuance Costs																							0	0	32,000
Stock Repurchased and Retired During Period, Shares					100,000
Treasury Stock Acquired, Average Cost Per Share					$ 0.176
Stock Repurchased and Retired During Period, Value					$ 17,600
Adjustments To Additional Paid In Capital At Market Offering Costs																							$ (79,000)
Market Offering [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares Issued, Price Per Share							$ 2.89
Proceeds from issuance of Common stock							$ 400,000
Issuance of Common Stock for At the Market Offering in shares							150,556
Adjustments To Additional Paid In Capital At Market Offering Costs							$ 79,000
Plan 2013 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Based compensation, shares available for issuance																				6,021,799			6,021,799
Plan 2007 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																				6,000,000			6,000,000
Longterm Incentive Program [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Class of Warrant or Right, Outstanding	500,000
Weighted Market Value Percentage of Invested Capital	44.80%
Weighted Average Cost Percentage of Capital	30.00%
Capital Units, Authorized												100.0
Share-based Compensation																							$ 300,000
Sharebased Compensation Arrangement By Sharebased Payment Award Percentage Of Shares Granted												1.00%
Checkpoint S2015 Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate																							1.50%
After Amendment [Member] | Convertible Preferred Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Price																				$ 0.001			$ 0.001
Capital Units, Authorized																				15,000,000			15,000,000
After Amendment [Member] | Convertible Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Price																				$ 0.001			$ 0.001
Capital Units, Authorized																				100,000,000			100,000,000
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																				10,000,000			10,000,000
Checkpoint [Member] | Private Placement [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights											$ 7.00
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures, Total											$ 126,640
Class of Warrant or Right, Number of Securities Called by Warrants or Rights											3,500
Warrant Purchase Price Per Unit											$ 45,000
Proceeds from Issuance of Private Placement											$ 600,000
Warrants Issued											44,324
Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross										1,900,000								3,900,000
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost										$ 400,000
Former Board Of Director [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Restricted Stock Units	$ 133,000
Dr. Rosenwald [Member] | Longterm Incentive Program [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period												510,434
Mr. Weiss [Member] | Longterm Incentive Program [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value												$ 2,800,000
Senior Vice President [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	50.00%
Stock Issued During Period, Value, Issued for Services																							$ 1,900,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross																			200,000
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost	$ 3,700,000
Director [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25.00%
Avenue Therapeutics, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Research And Development Expense																							14,000	29,000
General and Administrative Expense																							14,000	21,000
Allocated Share-based Compensation Expense																							$ 28,000	$ 50,400,000,000
Weighted Market Value Percentage of Invested Capital																								44.80%
Weighted Average Cost Percentage of Capital																								30.00%
Shares Issued, Price Per Share																								$ 0.146
Avenue Therapeutics, Inc. [Member] | Consultants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Issued During Period, Shares, Issued for Services																								150,000
Avenue Therapeutics, Inc. [Member] | Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Issued During Period, Shares, Issued for Services																								1,000,000
Avenue Therapeutics, Inc. [Member] | Share-based Compensation Award, Tranche One [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage																								50.00%
Avenue Therapeutics, Inc. [Member] | Share-based Compensation Award, Tranche Two [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage																								12.50%
Avenue Therapeutics, Inc. [Member] | Share-based Compensation Award, Tranche Three [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage																								50.00%
Mustang Bio, Inc [Member] | Private Placement [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights																				$ 8.50			$ 8.50
Stock Issued During Period Shares warrants Exercised																				2,500
Stock Issued During Period, Value of Warrants Excercised																				$ 65,000
Stock Issued During Period, Value, New Issues																					$ 39,100,000
Warrant Expiration Term																							5 years
Warrants Issued During Period																							1.5
Journey Medical Corporation [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Price																$ 0.65
Weighted Market Value Percentage of Invested Capital																44.50%
Weighted Average Cost Percentage of Capital																30.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross																1,950,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares, Beginning Balance																										1,250,000
Unamortized Debt Issuance Expense																										$ 800,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate																							0.00%
Journey Medical Corporation [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term																							6 years 11 months 12 days
Journey Medical Corporation [Member] | Employee [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted Market Value Percentage of Invested Capital																							42.70%	44.20%
Weighted Average Cost Percentage of Capital																							21.10%	25.10%
Shares Issued, Price Per Share																				$ 0.68			$ 0.68	$ 0.53
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures																							440,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate																							0.00%
Checkpoint Therapeutics, Inc [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate																							80.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate																							2.10%
Share Price																				$ 4.39		$ 0.065	$ 4.39
Allocated Share-based Compensation Expense																							$ 3,900,000
Fair Value Assumptions, Weighted Average Volatility Rate																						30.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage																						25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period																						48 months
Weighted Average Cost Percentage of Capital																						44.80%
Risk free rate																							83.00%
Equity Method Investment, Ownership Percentage																				37.70%			37.70%
JMC [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense																							$ 0.5	$ 600,000
Helocyte Inc [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense																							$ 0.3
Helocyte Inc [Member] | Consultants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate							68.00%																70.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate							1.30%																1.47%
Share Price							$ 0.46													$ 0.59			$ 0.59
Stock Issued During Period, Shares, Issued for Services							508,333	150,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period																							127,084
Helocyte Inc [Member] | Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Price																				0.097			$ 0.097
Stock Issued During Period, Shares, Issued for Services									1,000,000
Share-based Compensation																							$ 55,000
Helocyte Inc [Member] | Non-employee [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation																							200,000
Cellvation Inc [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense																							7,000
Cellvation Inc [Member] | Consultants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate					70.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate					1.10%
Share Price					$ 0.024
Stock Issued During Period, Shares, Issued for Services					700,000
Share-based Compensation					$ 2,500
Cellvation Inc [Member] | Employee [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Issued During Period, Shares, Issued for Services					1,000,000
Share-based Compensation					$ 4,000
National Holdings Corporation [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense																							$ 42,000
Class of Warrant or Right, Exercise Price of Warrants or Rights																				$ 3.25	$ 3.25		$ 3.25
National Holdings Corporation [Member] | Private Placement [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage Of Placement Agent Fee																				10.00%
Payments of Stock Issuance Costs																				$ 3,900,000
Private Placement Stock Units Shares To Be Issued																				10,000			10,000
Warrants Issued During Period																							601,486
Research and Development Expense [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense																							$ 4,700,000	5,800,000	1,100,000
General and Administrative Expense [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense																							$ 7,400,000	8,500,000	4,400,000
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Restricted Stock Units																								400,000	$ 4,343,692
Deferred Compensation Arrangement with Individual, Shares Issued																							230,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value																							$ 3.4
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period																							1,240,868
Restricted Stock [Member] | Journey Medical Corporation [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation																							$ 85,000
Restricted Stock [Member] | Checkpoint Therapeutics, Inc [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate																							100.65%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term																							10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate																							2.60%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross																							60,000
Share-based Compensation																							$ 1,400,000	$ 300,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price																							$ 5.43
Restricted Stock [Member] | General and Administrative Expense [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation																							$ 600,000
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	40,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value																							$ 1,800,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period																							641,000
Restricted Stock Units (RSUs) [Member] | Senior Vice President [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	1,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares																							150,000	300,000
New Award [Member] | Senior Vice President [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost	$ 3,300,000
Old Award [Member] | Senior Vice President [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost	$ 400,000
Employee Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Employee Stock Purchase Plan to eligible employees, Reckoning fair value percentage during offering period			85.00%										85.00%														85.00%	85.00%
Common Stock issued in connection with the first ESPP offering		14,681	7,139										13,317				6,841						177,919
Common Stock Par Or Stated Value Per Share			$ 1.45										$ 2.41														$ 1.80	$ 1.80
Share Price			$ 1.71										$ 2.84				$ 2.12										$ 2.12
Proceeds from Stock Options Exercised																								$ 200,000
Common Stock, Capital Shares Reserved for Future Issuance																				22,081			22,081
Employee Stock Option [Member] | Journey Medical Corporation [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation																							$ 400,000
Unvested Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation weighted-average vesting period																							2 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition																							2 years