Balance Sheets Details

Inventories

Inventories consisted of the following (in thousands):

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.

Intangible Assets, net

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	)	$	—

Goodwill

Goodwill had a carrying value of approximately $3.2 million at March 31, 2017 and December 31, 2016.