Balance Sheets Details (Tables)

6 Months Ended

Jun. 30, 2018

Inventories consisted of the following (in thousands):



	June 30, 2018			December 31, 2017
Raw materials	$	214		$	215
Work-in-process	62			53
Finished goods	2,157			2,147
Less: reserve	(1,397		)	(1,379		)
Inventories, net	$	1,036		$	1,036

Schedule of property and equipment, net

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



	June 30, 2018			December 31, 2017
Laboratory equipment ⁽¹⁾	$	20,636		$	19,777
Leasehold improvements	10,358			10,327
Computer equipment and software	3,770			3,695
Office equipment and furniture	1,195			1,185
Construction in progress ⁽²⁾	457			85
Property and equipment	36,416			35,069
Less: accumulated depreciation and amortization	(32,533		)	(32,254		)
Property and equipment, net	$	3,883		$	2,815

⁽¹⁾ Fully depreciated laboratory equipment with a cost of $0.2 million and $0.2 million was retired during six months ended June 30, 2018 and the fiscal year ended December 31, 2017, respectively.

⁽²⁾ Construction in progress includes equipment received but not yet placed into service pending installation.

Schedule of accrued liabilities

Other accrued liabilities consisted of the following (in thousands):



	June 30, 2018		December 31, 2017
Accrued purchases ⁽¹⁾	$	834	$	941
Accrued professional and outside service fees	1,666		2,393
Accrued expenses - cost of sales	1,387		—
Deferred rent	297		258
Lease incentive obligation	425		425
Other	442		345
Total	$	5,051	$	4,362

⁽¹⁾ Amount represents products and services received but not billed as of June 30, 2018 and December 31, 2017.