Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenue	$ 1,053	$ 3,535	$ 2,322	$ 7,822
Cost of goods sold	3,889	7,586	6,739	17,292
Gross loss	(2,836)	(4,051)	(4,417)	(9,470)
Operating expenses:
General and administrative	1,299	2,695	3,110	4,462
Sales and marketing	194	361	438	752
Research and development	195	652	836	1,231
Loss on disposal of assets	432	126	1,181	126
Asset impairment charge	675	265	675	265
Loss from operations	(5,631)	(8,150)	(10,657)	(16,306)
Other income (expense):
Interest income	28	19	34	43
Interest expense		(36)		(71)
Realized gain (loss) on foreign currency translation	13	(216)	19	467
Total other income (expense)	41	(233)	53	439
Loss before income taxes	(5,590)	(8,383)	(10,604)	(15,867)
Income tax benefit (expense)	(17)	174	(78)	325
Net loss	$ (5,607)	$ (8,209)	$ (10,682)	$ (15,542)
Net loss per common share
Basic	$ (2.16)	$ (3.12)	$ (4.04)	$ (5.92)
Diluted	$ (2.16)	$ (3.12)	$ (4.04)	$ (5.92)
Weighted average common shares outstanding used in computing net loss per common share	2,608,814	2,629,640	2,641,144	2,626,151