Liquidity and Capital Resources (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Estimated Projected Expenditure [Line Items]
Cash and cash equivalents	$ 45,995,642	$ 56,959,485	$ 58,875,925	$ 22,261,372
Currently projected expenditures for clinical programs	32,600,000
Aldoxorubicin [Member]
Estimated Projected Expenditure [Line Items]
Currently projected expenditures for clinical programs	5,500,000
Other Programs [Member]
Estimated Projected Expenditure [Line Items]
Currently projected expenditures for clinical programs	4,100,000
General Operation [Member]
Estimated Projected Expenditure [Line Items]
Currently projected expenditures for clinical programs	800,000
Other General and Administrative Expenses [Member]
Estimated Projected Expenditure [Line Items]
Currently projected expenditures for clinical programs	8,300,000
Interest and Term Loan Payment [Member]
Estimated Projected Expenditure [Line Items]
Currently projected expenditures for clinical programs	$ 13,700,000