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Related Party Transactions (Details) - USD ($)					1 Months Ended				3 Months Ended		12 Months Ended
Related Party Transactions (Details) - USD ($)	May 26, 2016	Mar. 16, 2016	Oct. 07, 2013	Mar. 24, 2010	Dec. 31, 2016	Sep. 30, 2016	Jan. 31, 2016	May 31, 2015	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	May 31, 2016	May 31, 2014
Related-Party Transactions (Textual) [Abstract]
Long-term other assets					$ 2,113,147				$ 1,525,154		$ 2,113,147
Subsidiary ownership percentage by parent													85.00%
Receivable from sale of intangible assets												$ 2,000,000
Future payments to be received from sale of intangible assets								$ 1,000,000
Ownership of investment								16.80%
Distributed											1,000,000
Carrying value of investment													$ 0
Investment in affiliated entity - PLS					3,777,510				$ 3,027,549		3,777,510
Available-for-sale Securities [Member]
Related-Party Transactions (Textual) [Abstract]
Investment owned (shares)									395,758			395,758
Available-for-sale Securities [Member] \| VGX International [Member]
Related-Party Transactions (Textual) [Abstract]
Investment owned (shares)								465,364
GeneOne Life Sciences [Member]
Related-Party Transactions (Textual) [Abstract]
Milestone-based 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
Revenue from related parties									$ 167,000	$ 113,000
Operating expenses related to affiliated entity									428,000	212,000
Accounts receivable balance					441,000				495,000		441,000
Accounts payable and accrued liability					379,000				41,000		379,000
Long-term other assets					571,000				$ 494,000		571,000
OncoSec [Member] \| First warrant [Member]
Related-Party Transactions (Textual) [Abstract]
Common stock purchase warrant (in shares)						50,000
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
Exercise price of a five-year warrant ($ per share)									$ 20.00
Director [Member]
Related-Party Transactions (Textual) [Abstract]
Term		5 years
Revenue from related parties									$ 614,000	0
Operating expenses related to affiliated entity									543,000	$ 0
Expenses to reimburse		$ 3,100,000
Award					6,100,000
Accounts receivable					152,000				516,000		152,000
Accounts payable/accrued liabilities					$ 671,000				$ 483,000		671,000
Noncontrolling Interest [Member]
Related-Party Transactions (Textual) [Abstract]
Distributed											$ 150,000