Balance Sheets Details (Tables)

6 Months Ended

Jun. 30, 2016

Balance Sheets Details [Abstract]

Schedule of inventory components

Inventories consisted of the following (in thousands):

	June 30, 2016		December 31, 2015
Raw materials	$	258	$	262
Work-in-process	153		—
Finished goods	744		730
Inventories	$	1,155	$	992

Schedule of property and equipment, net

Property and equipment, net consisted of the following (in thousands):

	June 30, 2016			December 31, 2015
Laboratory equipment	$	20,285		$	20,503
Leasehold improvements	10,395			10,369
Computer equipment and software	3,284			3,271
Office equipment and furniture	1,179			1,178
Construction in progress (1)	—			3
Property and equipment	35,143			35,324
Less: accumulated depreciation and amortization	(32,740		)	(32,215		)
Property and equipment, net	$	2,403		$	3,109

(1)    Construction in progress includes equipment received but not yet placed into service pending installation.

Schedule of Finite-Lived Intangible Assets

Intangible assets, net consisted of the following (in thousands, except weighted average amortization period): 

	June 30, 2016							December 31, 2015
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Amortization Period (years)
Developed and core technology	$	1,534	$	(1,534	)	$	—	$	1,534	$	(1,534	)	$	—	5
Maxygen intellectual property	20,244		(19,119		)	1,125		20,244		(17,432		)	2,812		6
Intangible assets, net	$	21,778	$	(20,653	)	$	1,125	$	21,778	$	(18,966	)	$	2,812