Commitments and Contingencies (Details)	9 Months Ended
	Sep. 30, 2017 USD ($) ft² Building
Cell Cure Neurosciences, Ltd. [Member]
Operating Leased Assets [Line Items]
Accrued milestone payments	$ 0
Cell Cure Neurosciences, Ltd. [Member] | Minimum [Member]
Operating Leased Assets [Line Items]
Royalty revenue percentage	15.00%
Cell Cure Neurosciences, Ltd. [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Royalty revenue percentage	25.00%
Milestone payments	$ 3,500,000
New Alameda Lease [Member]
Operating Leased Assets [Line Items]
Leased area | ft²	30,795
Number of buildings for lease | Building	2
Lease term	7 years
Number of years lease can be extended	5 years
Lease commencement date	Feb. 01, 2016
Base rent	$ 64,670
Base rent increase rate	3.00%