Commitments and Contingencies (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2017 USD ($) patient	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Jun. 15, 2013 USD ($)
Commitments And Contingencies [Line Items]
Deposits for clinical trial services	$ 1,920,894		$ 1,955,514
Discretionary cash bonus	$ 0	$ 0
Lease monthly rent				$ 8,063
Rent expense, monthly amount			8,554
Operating lease rent expense			$ 27,000
Novella Clinical
Commitments And Contingencies [Line Items]
Number of patients | patient	542
Deposits for clinical trial services	$ 1,782,775
Termination notice period	60 days
JHU
Commitments And Contingencies [Line Items]
Period within effective date of License Agreement	30 days
PharmaCell B.V Agreement
Commitments And Contingencies [Line Items]
Written notice period for termination	90 days
Written notice period for early termination	30 days
Employment Agreement With Management
Commitments And Contingencies [Line Items]
Base salary	$ 830,000
Discretionary cash bonus	$ 231,000