Inventory (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Inventory
Raw materials		$ 591
Work-in-process	$ 17,555	18,487
Finished goods	1,783	358
Total inventories	19,338	19,436
Inventories - current	1,783	358
Inventories - non -current	$ 17,555	$ 19,078
Shelf life for finished goods inventory, maximum	36 months