Commitments and Contingencies (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) ft² m² Building Option		Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 ILS (₪) ft² m²
Alameda Operating Lease Future Payments Due Fiscal Year Maturity [Abstract]
2017	$ 797,000
2018	822,000
2019	844,000
2020	870,000
2021	896,000
Thereafter	1,002,000
Total	5,231,000
Minimum annual lease payments under the various operating leases [Abstract]
2017	1,098,000	[1]
2018	1,045,000	[1]
2019	1,042,000	[1]
2020	1,048,000	[1]
2021	897,000	[1]
Thereafter	1,002,000	[1]
Total	6,132,000	[1]
Minimum annual lease payments under capital leases [Abstract]
2017	202,000
2018	217,000
2019	93,000
2020	0
2021	0
Thereafter	0
Total	$ 512,000
New Alameda Lease [Member]
Operating Leased Assets [Line Items]
Lease term	7 years
Number of years lease can be extended	5 years
Leased area | ft²	30,795				30,795
Number of buildings for lease | Building	2
Base rent	$ 64,670
Base rent increase rate	3.00%				3.00%
Tenant improvement allowance	$ 1,400,000
Security Deposit	847,000
Security deposit reduction in value after first twenty four months of lease term	423,000
Security deposit reduction in value after first thirty six months of lease term	346,000
Reporting Entities [Member] | Office space in New York City [Member]
Operating Leased Assets [Line Items]
Base rent	$ 5,050
Cell Cure [Member] | Office and laboratory space, Jerusalem, Israel [Member]
Operating Leased Assets [Line Items]
Number of years lease can be extended	5 years
Leased area | m²	1,128				1,128
Base rent	$ 14,400				₪ 55,218
Rent expenses	$ 1,500,000		$ 2,100,000	$ 2,000,000
Number of five year options to extend lease term | Option	2
Research and Development Licensing Agreements [Member]
Royalty Obligations and License Fees [Abstract]
License fees and related expenses	$ 180,000		$ 282,000	$ 432,000
Research and Development Licensing Agreements [Member] | Minimum [Member]
Royalty Obligations and License Fees [Abstract]
Minimum annual maintenance fees	140,000
Research and Development Licensing Agreements [Member] | Maximum [Member]
Royalty Obligations and License Fees [Abstract]
Minimum annual maintenance fees	$ 160,000

[1] Includes the lease of our principal office and laboratory facilities in Alameda, California, including the lease liability, leases of the offices and laboratory facilities of LifeMap Sciences, Cell Cure and other operating leases of lab equipment.