Inventories (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Inventories
Raw materials	$ 4,348		$ 3,157
Work in process	7,873		8,322
Finished goods	9,748		5,738
Total inventories	21,969		17,217
Inventories disclosure
Inventory expensed	868	502
Cost Of Sales [Member]
Inventories disclosure
Inventory expensed	300
Research And Development Expense [Member]
Inventories disclosure
Inventory expensed	$ 600