Balance Sheets Details (Tables)

9 Months Ended

Sep. 30, 2017

Balance Sheets Details [Abstract]

Allowance for Credit Losses on Financing Receivables [Table Text Block]

The following is a summary of activity in our allowance for doubtful accounts for the periods presented (in thousands):

Allowance as of December 31, 2016	$	(421	)
Write-offs and other (1)	387
Allowance as of September 30, 2017	$	(34	)

(1) The change in allowance for doubtful accounts was mainly related to the write-off of receivables from a foreign customer.

Schedule of inventory components

Inventories consisted of the following (in thousands):

	September 30, 2017		December 31, 2016
Raw materials	$	159	$	118
Work-in-process	110		59
Finished goods	580		648
Inventories	$	849	$	825

Schedule of property and equipment, net

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

	September 30, 2017			December 31, 2016
Laboratory equipment	$	19,682		$	18,849
Leasehold improvements	10,503			10,395
Computer equipment and software	3,678			3,267
Office equipment and furniture	1,185			1,171
Construction in progress (2)	50			124
Property and equipment	35,098			33,806
Less: accumulated depreciation and amortization	(32,288		)	(31,651		)
Property and equipment, net	$	2,810		$	2,155

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