Liquidity and Capital Resources (Details) - USD ($)		6 Months Ended
	Jul. 20, 2016	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Estimated Projected Expenditure [Line Items]
Cash and cash equivalents		$ 55,913,199	$ 22,261,372	$ 38,833,736	$ 32,218,905
Currently projected expenditures for clinical programs		42,700,000
Subsequent Event [Member]
Estimated Projected Expenditure [Line Items]
Proceeds from public offering of common shares and warrants	$ 18,300,000
Aldoxorubicin [Member]
Estimated Projected Expenditure [Line Items]
Currently projected expenditures for clinical programs		21,600,000
Other Programs [Member]
Estimated Projected Expenditure [Line Items]
Currently projected expenditures for clinical programs		5,300,000
General Operation [Member]
Estimated Projected Expenditure [Line Items]
Currently projected expenditures for clinical programs		3,200,000
Other General and Administrative Expenses [Member]
Estimated Projected Expenditure [Line Items]
Currently projected expenditures for clinical programs		8,900,000
Interest and Term Loan Payment [Member]
Estimated Projected Expenditure [Line Items]
Currently projected expenditures for clinical programs		$ 3,700,000