Liquidity and Capital Resources (Details) - USD ($)	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Estimated projected expenditure [Line Items]
Cash and cash equivalents	$ 55,779,620	$ 32,218,905	$ 39,412,296	$ 11,483,112
Short-term investments	15,022,454	$ 45,621,593
Currently projected expenditures for clinical programs	56,600,000
Aldoxorubicin [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	36,900,000
Other Programs [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	3,700,000
General Operation [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	4,000,000
Other General and Administrative Expenses [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	$ 12,000,000