Liquidity and Capital Resources (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Estimated projected expenditure [Line Items]
Cash and cash equivalents	$ 39,412,296	$ 11,483,112	$ 6,036,220	$ 14,344,088
Short-term investments	50,621,593	27,084,980
Currently projected expenditures for clinical programs	62,600,000
Aldoxorubicin [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	48,000,000
Other Programs [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	1,900,000
General Operation [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	4,200,000
Other General and Administrative Expenses [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	$ 8,500,000