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Related Party Transactions (Details) - USD ($)						1 Months Ended				12 Months Ended
Related Party Transactions (Details) - USD ($)	Sep. 28, 2016	May 26, 2016	Mar. 16, 2016	Oct. 07, 2013	Mar. 24, 2010	Jan. 31, 2016	May 31, 2015	Mar. 31, 2012	Sep. 30, 2011	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	May 31, 2016	May 31, 2014
Related-Party Transactions (Textual) [Abstract]
Long-term other assets										$ 2,113,147	$ 670,833
Ownership percentage by parent														85.00%
Payment of receivable													$ 2,000,000
Future payments to be received							$ 1,000,000
Ownership							16.80%
Payment of cash distribution										1,000,000	1,000,000
Investment in affiliated entity - PLS										3,777,510	5,045,915
Minority shareholders
Related-Party Transactions (Textual) [Abstract]
Payment of cash distribution										$ 149,559	149,559
Plumbline Life Sciences
Related-Party Transactions (Textual) [Abstract]
Carrying value of investment														$ 0
Available-for-sale Securities
Related-Party Transactions (Textual) [Abstract]
Number of shares owned													395,758
Available-for-sale Securities \| Plumbline Life Sciences
Related-Party Transactions (Textual) [Abstract]
Number of shares owned										395,758
VGX Pharmaceuticals \| Available-for-sale Securities
Related-Party Transactions (Textual) [Abstract]
Number of shares owned							465,364
First warrant \| Fair Value, Inputs, Level 3
Related-Party Transactions (Textual) [Abstract]
Common stock purchase warrant (shares)	50,000								50,000
Exercise price of a five-year warrant ($ per share)	$ 24.00								$ 24.00
Second warrant \| Fair Value, Inputs, Level 3
Related-Party Transactions (Textual) [Abstract]
Common stock purchase warrant (shares)								150,000
Exercise price of a five-year warrant ($ per share)								$ 20.00
GeneOne (affiliated entity)
Related-Party Transactions (Textual) [Abstract]
Ownership target		35.00%				35.00%
Term				20 years
Payment received for license granted					$ 3,000,000
Deferred revenue from affiliated entity					$ 3,000,000
Period over which deferred revenue from affiliated entity will be recognized in years					8 years
Accounts payable/accrued liability										$ 379,000	165,000
NIAID
Related-Party Transactions (Textual) [Abstract]
Revenue from related parties										1,200,000	450,000	$ 479,000
Operating expenses related to affiliated entity										2,800,000	6,900,000	$ 4,200,000
Accounts receivable from related parties										441,000	4,000
Long-term other assets										$ 571,000	$ 373,000
OncoSec \| Second warrant
Related-Party Transactions (Textual) [Abstract]
Common stock purchase warrant (shares)										150,000
Exercise price of a five-year warrant ($ per share)										$ 20.00
Director
Related-Party Transactions (Textual) [Abstract]
Term			5 years
Revenue from related parties										$ 341,000
Operating expenses related to affiliated entity										985,000
Expenses to reimburse			$ 3,100,000
Accounts receivable										152,000
Due to related parties										$ 671,000