Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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

-Publisher FASB

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher SEC

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-Number 210

-Section 02

-Paragraph 1

-Article 5

+ Details

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References+ Details

LIQUIDITY AND CAPITAL RESOURCES (Details) (USD $)	12 Months Ended
LIQUIDITY AND CAPITAL RESOURCES (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Liquidity and capital resources
Net proceeds from issuance of shares and warrants	$ 3,260,865	$ 23,876,370	$ 48,452,644
Cash and cash equivalents	34,794,341	57,225,234	38,155,251	29,858,465
Common stock
Liquidity and capital resources
Net proceeds from issuance of shares and warrants	3,300,000
Minimum
Liquidity and capital resources
Net cash required to obligate the entity to effect merger	17,000,000
Period for which cash and cash equivalents will meet liquidity requirements	3 years
Number of products or technologies licensed by the entity as an alternative to raising additional financing	1
Maximum
Liquidity and capital resources
Period for which cash and cash equivalents will meet liquidity requirements	5 years
2013 Notes
Liquidity and capital resources
Principal amount	$ 8,277,850
Interest rate (as a percent)	3.125%