Deferred Revenues (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($) Customers	Dec. 31, 2014 USD ($) Customers
Deferred Revenues (Textual)
Deferred license fee revenue	$ 3,016	$ 3,403
Prepayments for Future License Fees [Member]
Deferred Revenues (Textual)
Deferred license fee revenue	$ 1,900	$ 3,000
Number of customer | Customers	5	5
Deferred Engineering Development Fees [Member]
Deferred Revenues (Textual)
Deferred license fee revenue	$ 1,100	$ 400
Number of customer | Customers	1	4