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Selected Balance Sheet Components
 6 Months Ended
Jun. 30, 2019
Balance Sheet Related Disclosures [Abstract]  
Selected Balance Sheet Components
Selected Balance Sheet Components
 
Inventory as of June 30, 2019 and December 31, 2018:
(In thousands)
June 30, 2019
 
December 31, 2018
Raw materials
$
4,127

 
$
2,872

Work-in-process
596

 
638

Finished goods
65

 
48

Inventory
$
4,788

 
$
3,558


 
Property and equipment, net as of June 30, 2019 and December 31, 2018: 
(In thousands) 
June 30, 2019
 
December 31, 2018
Machinery and equipment
$
2,456

 
$
1,536

Furniture, fixtures and office equipment
775

 
775

Computer equipment and software
5,906

 
3,712

Leasehold improvements
4,631

 
4,587

Construction in process
1,230

 
2,801

Financing right-of-use lease
166

 
—

Total property and equipment, gross
15,164

 
13,411

Less: Accumulated depreciation
(8,201
)
 
(7,505
)
 
$
6,963

 
$
5,906


 
Depreciation expense for the three and six months ended June 30, 2019 was $0.4 million and $0.7 million and $0.4 million and $0.8 million for the same period in 2018.

Accrued expenses as of June 30, 2019 and December 31, 2018:
(In thousands)
June 30, 2019
 
December 31, 2018
Bonus related compensation
$
1,528

 
$
5,161

Employee related accruals
2,695

 
1,559

Other accrued expenses
478

 
210

 
$
4,701

 
$
6,930