Unaudited Condensed Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Revenue — related party	$ 1,822	$ 1,822	$ 5,466	$ 5,466
Revenue	2,558	2,341	8,261	7,718
Total revenue	4,380	4,163	13,727	13,184
Cost of revenue	3,660	3,986	11,800	12,531
Gross profit	720	177	1,927	653
Operating expenses:
Research and development	2,478	1,050	5,621	3,203
Selling, general and administrative	2,046	1,141	5,507	3,150
Gain on insurance recovery	0	0	(165)	0
Gain on sale of asset	0	(2)	0	(988)
Total operating expenses	4,524	2,189	10,963	5,365
Loss from operations	(3,804)	(2,012)	(9,036)	(4,712)
Other (income) expense:
Amortization of deferred financing costs and debt discount	0	982	755	2,504
Loss on extinguishment of debt	0	0	1,389	0
Interest expense — related party	0	249	0	703
Interest expense	0	46	49	142
Derivative fair value adjustment	0	671	(10,080)	671
Other expense	0	0	10	0
Total other (income) expense:	0	1,948	(7,877)	4,020
Net loss	(3,804)	(3,960)	(1,159)	(8,732)
Deemed dividend for beneficial conversion feature on Series D-2 preferred stock	0	0	(909)	0
Deemed dividend for antidilution adjustments to convertible preferred stock	0	0	(214)	0
Accretion of convertible preferred stock	0	0	(510)	0
Net loss attributable to common stockholders	$ (3,804)	$ (3,960)	$ (2,792)	$ (8,732)
Net loss per share attributable to common stockholders:
Basic (USD per share)	$ (0.45)	$ (11.79)	$ (0.59)	$ (25.99)
Diluted (USD per share)	$ (0.45)	$ (11.79)	$ (2.59)	$ (25.99)
Weighted average common shares outstanding:
Basic (shares)	8,504,785	335,938	4,703,278	335,930
Diluted (shares)	8,504,785	335,938	4,976,965	335,930