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Consolidated Balance Sheet Details (Tables)
 12 Months Ended
Dec. 31, 2015
Balance Sheet Related Disclosures [Abstract]  
Inventory
Inventory (in thousands)
 
December 31,
 
2015
 
2014
Raw materials
$
3,775

 
$
3,453

Work in process
8,255

 
7,991

 
$
12,030

 
$
11,444
Property and Equipment, Net
Property and Equipment, Net (in thousands)
 
December 31,
 
2015
 
2014
Machinery, equipment and tooling
$
12,859

 
$
12,847

Construction in progress
4,647

 
4,974

Computer equipment and software
579

 
1,038

Leasehold improvements
1,271

 
783

Furniture and fixtures
667

 
615

Property and equipment, at cost
20,023

 
20,257

Less accumulated depreciation
(10,769
)
 
(9,639
)
 
$
9,254

 
$
10,618
Long-lived Assets by Geographic Areas
The Company had net long-lived assets consisting of property and equipment in the following regions as of December 31, 2015 and 2014 (in thousands):
 
December 31
 
2015
 
2014
United States
$
796

 
$
796

United Kingdom
3,764

 
4,645

Ireland
2,390

 
2,608

Germany
2,249

 
2,506

Other
55

 
63

 
$
9,254

 
$
10,618
Other Assets
Other Assets (in thousands)
 
December 31,
 
2015
 
2014
Prepaid royalty expense
$
2,000

 
$
2,286

Debt acquisition costs
72

 
241

Deposits
556

 
305

Prepaid clinical trial costs
775

 
—

 
$
3,403

 
$
2,832
Accrued Expenses
Accrued Expenses (in thousands)
 
December 31,
 
2015
 
2014
Accrued product returns
$
1,985

 
$
4,694

Accrued interest expense, current portion
178

 
32

Accrued clinical trial costs
1,162

 
554

Other accrued expenses
1,292

 
736

 
$
4,617

 
$
6,016
Other Long-Term Liabilities
Other Long-Term Liabilities (in thousands)
 
December 31,
 
2015
 
2014
 
 
 
 
Deferred rent
$
767

 
$
664

Accretion of terminal fee due at maturity on term loan
407

 
—

Asset retirement obligation
371

 
325

Other long-term liabilities
43

 
64

 
$
1,588

 
$
1,053