Commitments (Narrative) (Details)		1 Months Ended				12 Months Ended
	Jul. 01, 2014 USD ($) ft²	Jun. 30, 2014	Dec. 31, 2013 USD ($) ft²	Sep. 30, 2008 USD ($)	May. 31, 2007 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($) ft²
Finite-Lived Intangible Assets [Line Items]
Office space square footage | ft²			21,517					21,517
Base monthly rent expense			$ 120,824
Rent expense						$ 2,100,000	$ 2,200,000	$ 2,900,000
Lease Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Rent escalation, percentage					4.00%
Allowance toward cost of leasehold improvements					$ 200,000
Expansion Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Rent escalation, percentage				6.00%
Allowance toward cost of leasehold improvements				$ 500,000
Second Amendment Agreement [Member]
Finite-Lived Intangible Assets [Line Items]
Lease term			4 years
Lease renewal			5 years
Office space square footage | ft²	11,886
Base monthly rent expense	$ 51,704
Annual rent escalation per year	3.00%
China Lease [Member]
Finite-Lived Intangible Assets [Line Items]
Lease renewal		2 years