Consolidated statements of operations (unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Revenue	$ 14,268	$ 8,307
Cost of goods sold	21,762	11,682
Gross loss	(7,494)	(3,375)
Operating expenses:
General and administrative	2,388	2,190
Sales and marketing	467	349
Research and development	576	382
Loss from operations	(10,925)	(6,296)
Other income:
Interest income	21	13
Interest expense	(23)	(23)
Realized gain (loss) on foreign currency translation	39	(112)
Total other income (expense)	37	(122)
Loss before income taxes	(10,888)	(6,418)
Income tax (expense) benefit	(6)	3,042
Net loss	$ (10,894)	$ (3,376)
Net loss per common share
Basic	$ (0.43)	$ (0.15)
Diluted	$ (0.43)	$ (0.15)
Weighted average common shares outstanding used in computing net loss per common share basic and diluted	25,317,147	22,550,378