Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Product	$ 4,957	$ 3,091	$ 7,534	$ 4,865
License	92	83	184	166
Related party		183		382
Total revenues	5,049	3,357	7,718	5,413
Cost of product revenues, including cost of product revenues to related parties of $0 and $113 for the three months ended June 30, 2016 and 2015, respectively and $0 and $195 for the six months ended June 30, 2016 and 2015, respectively	3,118	2,994	5,387	4,992
Gross profit	1,931	363	2,331	421
Operating Expenses:
Research, development and patent	2,313	3,328	4,635	6,750
Selling, general and administrative	4,512	7,411	10,042	15,298
Total operating expenses	6,825	10,739	14,677	22,048
Loss from operations	(4,894)	(10,376)	(12,346)	(21,627)
Other income (expense):
Interest income	10	6	25	15
Interest expense	(759)	(659)	(1,509)	(1,328)
Interest expense to related parties	(1,083)		(2,166)
Other income (expense), net	(57)	44	(63)	41
Total other expense, net	(1,889)	(609)	(3,713)	(1,272)
Loss before income taxes	(6,783)	(10,985)	(16,059)	(22,899)
Income taxes	0	0	0	0
Net loss	$ (6,783)	$ (10,985)	$ (16,059)	$ (22,899)
Basic and diluted net loss per common share	$ (0.28)	$ (0.45)	$ (0.65)	$ (0.94)
Weighted-average shares outstanding used in computing net loss per common share	24,598	24,465	24,584	24,465