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Fair Value of Financial Instruments (Valuation of Securities Using Fair Value Hierarchy) (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
United States
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	$ (9,110,119)	$ (19,971,629)
Short-Term Investments
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	66,937,868	52,963,042
Fair Value, Inputs, Level 1 | United States
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	(9,110,119)	(19,971,629)
Fair Value, Inputs, Level 1 | Short-Term Investments
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	66,937,868	52,963,042
Fair Value, Inputs, Level 2 | United States
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 | Short-Term Investments
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | United States
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Short-Term Investments
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	$ 0	$ 0

X

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Trading Securities
-URI http://asc.fasb.org/extlink&oid=6526789

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 35
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e24584-111560

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Available-for-Sale Securities
-URI http://asc.fasb.org/extlink&oid=6505594

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 1
-Subparagraph a, f, g
-Article 7

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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