Commitments and Contingent Liabilities (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013 item	May 02, 2013 sqft
Lease
Area of office space (in square feet)		33,000
Term of lease	5 years 5 months
Period from the lease commencement date after which the Company's obligation to pay rent commences	5 months
Annual rental obligations in the first year	$ 0.4
Annual rental obligations in the fifth year	$ 0.5
Number of renewal options	2
Period of each renewal option	5 years