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Related Party Transactions (Details) - USD ($)						1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 16, 2016	Oct. 07, 2013	Mar. 24, 2012	Sep. 28, 2011	Mar. 24, 2010	May 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	May 31, 2016	Dec. 31, 2015	Aug. 01, 2015	May 31, 2014
Related-Party Transactions (Textual) [Abstract]
Long-term other assets							$ 1,326,317		$ 1,326,317			$ 676,803
Subsidiary ownership percentage by parent								91.00%		91.00%				85.00%
Receivable from sale of intangible assets											$ 1,000,000
Future payments to be received from sale of intangible assets						$ 1,000,000
Equity ownership percentage after transaction								20.00%		20.00%
Maximum amount of additional equity fundraising								$ 10,000,000		$ 10,000,000
Ownership of investment							16.90%		16.90%
Carrying value of investment							$ 5,300,000		$ 5,300,000					$ 0
Available-for-sale Securities
Related-Party Transactions (Textual) [Abstract]
Investment owned (shares)							395,758		395,758
Available-for-sale Securities | VGX International [Member]
Related-Party Transactions (Textual) [Abstract]
Investment owned (shares)													465,364
GeneOne Life Sciences [Member]
Related-Party Transactions (Textual) [Abstract]
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
Revenue from related parties							$ 463,000	113,000	$ 576,000	225,000
Operating expenses related to affiliated entity							1,100,000	$ 5,300,000	1,300,000	$ 5,400,000
Accounts receivable balance							345,000		345,000			4,000
Accounts payable and accrued liability							424,000		424,000			165,000
Long-term other assets							488,000		488,000			$ 373,000
OncoSec [Member] | First warrant [Member]
Related-Party Transactions (Textual) [Abstract]
Common stock purchase warrant (in shares)				50,000
Term of the warrants in years				5 years
Exercise price of a five-year warrant ($ per share)				$ 24.00
OncoSec [Member] | Second warrant [Member]
Related-Party Transactions (Textual) [Abstract]
Common stock purchase warrant (in shares)			150,000
Term of the warrants in years			5 years
Exercise price of a five-year warrant ($ per share)			$ 20.00
Director [Member]
Related-Party Transactions (Textual) [Abstract]
Term	5 years
Operating expenses related to affiliated entity							$ 80,000		$ 80,000
Expenses to reimburse	$ 3,100,000

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