CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue	$ 10,362	$ 10,542	$ 26,829	$ 30,425
Cost of revenue	5,689	6,826	14,598	17,663
Gross profit	4,673	3,716	12,231	12,762
Operating expenses:
Research and development	7,250	4,363	16,614	10,569
Selling, general and administrative	8,724	7,728	27,040	22,535
Amortization of intangible assets	50	50	151	151
Total operating expenses	16,024	12,141	43,805	33,255
Loss from operations	(11,351)	(8,425)	(31,574)	(20,493)
Non-operating gain (expense), net:
Gain (loss) from revaluation of warrant liability	1,738	(12,416)	14,263	(16,803)
Foreign exchange (loss) gain	(941)	409	(945)	198
Interest expense	(342)	(41)	(676)	(279)
Other income, net	145	32	449	65
Total non-operating gain (expense), net	600	(12,016)	13,091	(16,819)
Loss before income taxes	(10,751)	(20,441)	(18,483)	(37,312)
Provision for income taxes	8	60	90	165
Net loss	$ (10,759)	$ (20,501)	$ (18,573)	$ (37,477)
Net loss per share:
Basic	$ (0.14)	$ (0.29)	$ (0.25)	$ (0.56)
Diluted	$ (0.16)	$ (0.29)	$ (0.44)	$ (0.56)
Weighted average shares outstanding used for calculating net loss per share:
Basic	75,194	69,791	73,407	66,464
Diluted	76,103	69,791	75,437	66,464