Subsequent Events (Details Textual) - USD ($)		1 Months Ended	3 Months Ended				12 Months Ended
	Feb. 03, 2017	Nov. 17, 2016	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jan. 18, 2017	Jan. 06, 2017
Subsequent Event [Line Items]
Special One Time Cash Dividend Payable Per Share, Common Stock		$ 2.91	$ 2.91	$ 0	$ 0	$ 0
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			1,051,358				1,051,358	1,422,781	4,495,556
Derivative Liability			$ 1,465,272				$ 1,465,272
Proceeds from Stock Options Exercised							$ 3,800,000	$ 1,000,000	$ 500,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Percentage of Aggregate Payment On After Tax Net Cash Proceed from SIGA	98.00%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights											903,996
Class of Warrant or Right, Exercise Price of Warrants or Rights											$ 1.63
Derivative Liability											$ 1,600,000
Proceeds from Stock Options Exercised	$ 217,100,000
Subsequent Event [Member] | Exchange Ratio [Member]
Subsequent Event [Line Items]
Equity Method Investment, Ownership Percentage										41.80%
Subsequent Event [Member] | Altimmune Inc [Member]
Subsequent Event [Line Items]
Equity Method Investment, Ownership Percentage										58.20%