Inventories (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Inventory [Roll Forward]
Inventory work-in-process, beginning	$ 1,326
Production		1,443
Transfer to other assets	(1,326)
Spoilage		(117)
Inventory work-in-process, end of period		$ 1,326