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Balance Sheet Details
6 Months Ended
Jun. 30, 2018
Balance Sheet Related Disclosures [Abstract]  
Balance Sheet Details Balance Sheet Details

Inventories

Inventories consisted of the following (in thousands):
 
June 30, 2018
 
December 31, 2017
Raw materials
$
7,714

 
$
7,566

Work-in-process
1,001

 
929

Finished goods
6,536

 
6,593

Total inventories, net
$
15,251

 
$
15,088



Property and Equipment, net

Property and equipment, net consisted of the following (in thousands):
 
June 30, 2018
 
December 31, 2017
Computer equipment and software
$
4,168

 
$
4,179

Laboratory and manufacturing equipment
20,145

 
20,069

Leasehold improvements
7,704

 
7,799

Office furniture and fixtures
1,865

 
1,892

Property and equipment, gross
33,882

 
33,939

Less accumulated depreciation and amortization
(23,505
)
 
(21,646
)
Construction-in-progress
47

 
8

Property and equipment, net
$
10,424

 
$
12,301



Warranty
We accrue for estimated warranty obligations once revenue is recognized. Management periodically reviews the estimated fair value of its warranty liability and records adjustments based on the terms of warranties provided to customers, as well as historical and anticipated warranty claim experience. Activity for our warranty accrual for the three and six months ended June 30, 2018, and 2017, which is included in other accrued liabilities, is summarized below (in thousands): 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
Beginning balance
$
591

 
$
864

 
$
699

 
$
1,023

Accrual for current period warranties
401

 
19

 
738

 
187

Warranty costs incurred
(383
)
 
(177
)
 
(828
)
 
(504
)
Ending balance
$
609

 
$
706

 
$
609

 
$
706