Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer.

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-Name Accounting Research Bulletin (ARB)

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-Name Statement of Financial Accounting Standard (FAS)

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-Subparagraph b

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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+ Details

Marketable Securities (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Marketable securities	$ 15,067,770	$ 18,057,672
Certificates of Deposit [Member] \| Maturity date of July 12, 2012 [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities	5,100,000
Certificates of Deposit [Member] \| Maturity date of October 4, 2012 [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities	7,000,000
Certificates of Deposit [Member] \| Maturity Date Of March 28, 2013 [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities	$ 3,000,000