Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Revenue	$ 23,818	$ 45,685	$ 41,513
Cost of goods sold	46,961	75,372	63,434
Gross loss	(23,143)	(29,687)	(21,921)
Operating expenses:
General and administrative	9,589	9,863	8,629
Sales and marketing	1,363	1,468	1,521
Research and development	2,210	1,861	2,263
Long-lived asset impairment charge	39,597
Loss on disposal of assets	47	734	550
Loss from operations	(75,949)	(43,613)	(34,884)
Other income (expense):
Interest income	71	86	51
Interest expense	(109)	(95)	(95)
Realized loss on foreign currency translation	(1,869)	(551)	(583)
Realized gain on investments		258
Total other expense	(1,907)	(302)	(627)
Loss before income taxes	(77,856)	(43,915)	(35,511)
Income tax (expense) benefit	26	(78)	5,160
Net loss	$ (77,830)	$ (43,993)	$ (30,351)
Net loss per common share
Basic	$ (2.98)	$ (1.70)	$ (1.35)
Diluted	$ (2.98)	$ (1.70)	$ (1.35)
Weighted average common shares outstanding used in computing net loss per common share
Basic	26,156,170	25,815,405	22,572,212
Diluted	26,156,170	25,815,405	22,572,212