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Marketable Securities and Fair Value Measurements (Details Textual)	1 Months Ended		3 Months Ended		6 Months Ended
	Mar. 31, 2012 $ / shares shares	Sep. 30, 2011 $ / shares shares	Jun. 30, 2016 USD ($) shares	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) shares	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) warrant shares	Jul. 01, 2015 USD ($)
Marketable Securities and Fair Value Measurements (Textual) [Abstract]
Carryover basis								$ 0
Increase (decrease) in fair value included in change in fair value of common stock warrants			$ 108,000	$ 23,000	$ 514,000	$ 313,000
Common stock warrants			1,815,343		1,815,343		$ 1,301,138
Onco Sec Common Stock Warrants [Member]
Marketable Securities and Fair Value Measurements (Textual) [Abstract]
Increase (decrease) in fair value included in change in fair value of common stock warrants			$ (3,000)	$ (73,000)	$ (6,000)	$ (364,000)
Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Marketable Securities and Fair Value Measurements (Textual) [Abstract]
Number of shares held in an affiliated entity (shares) | shares			1,644,155		1,644,155		1,644,155
Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Common Stock [Member]
Marketable Securities and Fair Value Measurements (Textual) [Abstract]
Investment owned (shares) | shares			395,758		395,758
Using Significant Unobservable Inputs (Level 3) [Member]
Marketable Securities and Fair Value Measurements (Textual) [Abstract]
Number of warrants received to purchase shares of common stock | warrant							2
Increase (decrease) in fair value included in change in fair value of common stock warrants					$ 514,204
Using Significant Unobservable Inputs (Level 3) [Member] | First warrant [Member]
Marketable Securities and Fair Value Measurements (Textual) [Abstract]
Common stock purchase warrant (in shares) | shares		50,000
Term of the warrants in years		5 years
Exercise price of a five-year warrant ($ per share) | $ / shares		$ 24.00
Using Significant Unobservable Inputs (Level 3) [Member] | Second warrant [Member]
Marketable Securities and Fair Value Measurements (Textual) [Abstract]
Common stock purchase warrant (in shares) | shares	150,000
Term of the warrants in years	5 years
Exercise price of a five-year warrant ($ per share) | $ / shares	$ 20.00

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Exercise price of the warrants.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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-Publisher FASB
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-SubTopic 10
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Balance held at close of period in number of shares.

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Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

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