Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Product revenues	$ 82,136	$ 73,554	$ 244,916	$ 212,325
Contract revenues	122		210
Total revenues	82,258	73,554	245,126	212,325
Operating expenses:
Cost of product revenues	13,062	13,718	44,083	39,513
Research and development	15,109	13,480	46,397	47,193
Selling and marketing	38,838	35,369	116,327	107,964
General and administrative	18,268	16,425	55,243	48,594
Total operating expenses	85,277	78,992	262,050	243,264
Loss from operations	(3,019)	(5,438)	(16,924)	(30,939)
Interest income	117	54	282	163
Gain on sales of equity securities			2,009
Other income (expense), net	(111)	(158)	(174)	(207)
Loss before income taxes	(3,013)	(5,542)	(14,807)	(30,983)
Income tax expense (benefit)	(193)	6,301	464	(410)
Net loss	$ (2,820)	$ (11,843)	$ (15,271)	$ (30,573)
Basic and diluted net loss per share (in dollars per share)	$ (0.08)	$ (0.36)	$ (0.46)	$ (0.95)
Shares used in computing basic and diluted net loss per share (in shares)	33,391	32,498	33,141	32,294