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)

-Number 43

-Section A

-Paragraph 4, 5

-Chapter 3

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-Name Statement of Financial Accounting Standard (FAS)

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-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

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-Number 133

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-Topic 320

-SubTopic 10

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+ Details

- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section 45

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-Subparagraph (a)

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-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6507016

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

+ Details

Liquidity and Capital Resources (Details) (USD $)	6 Months Ended
Liquidity and Capital Resources (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2010
Estimated projected expenditure [Line Items]
Cash and cash equivalents	$ 11,859,009	$ 17,988,590	$ 7,023,176	$ 6,324,430
Marketable securities	15,067,770	18,057,672
Currently projected expenditures for clinical programs	23,800,000
Aldoxorubicin [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	9,300,000
Bafetinib [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	300,000
Tamibarotene [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	5,500,000
General Operation [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	2,400,000
Other General and Administrative Expenses [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	$ 6,300,000