Balance Sheets Details (Tables)

3 Months Ended

Mar. 31, 2017

Balance Sheets Details [Abstract]

Schedule of inventory components

Inventories consisted of the following (in thousands):

	March 31, 2017		December 31, 2016
Raw materials	$	142	$	118
Work-in-process	163		59
Finished goods	819		648
Inventories	$	1,124	$	825

Schedule of property and equipment, net

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

	March 31, 2017			December 31, 2016
Laboratory equipment	$	19,412		$	18,849
Leasehold improvements	10,466			10,395
Computer equipment and software	3,314			3,267
Office equipment and furniture	1,179			1,171
Construction in progress (1)	358			124
Property and equipment	34,729			33,806
Less: accumulated depreciation and amortization	(31,977		)	(31,651		)
Property and equipment, net	$	2,752		$	2,155

(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): 

	March 31, 2017							December 31, 2016
	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		(20,244		)	—		20,244		(20,244		)	—		6
Intangible assets, net	$	21,778	$	(21,778	)	$	—	$	21,778	$	(21,778	)	$	—