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Property and Equipment
 12 Months Ended
Dec. 31, 2016
Property, Plant and Equipment [Abstract]  
Property and Equipment
Property and Equipment    
Property and equipment consisted of the following at December 31 (in thousands):
 
Useful Life
(Years)
 
2016
 
2015
Manufacturing equipment
5
 
$
6,445

 
$
4,543

Lease and loaner instruments
1 - 5
 
3,581

 
3,318

Prototype instruments
2
 
2,975

 
2,956

Computer equipment
3
 
1,592

 
1,847

Furniture and fixtures
5
 
1,642

 
1,390

Leasehold improvements
Various
 
8,878

 
5,874

Construction in progress
 
 
1,861

 
1,921

Total property and equipment, gross
 
 
26,974


21,849

Less: Accumulated depreciation and amortization
 
 
(14,816
)
 
(12,435
)
Total property and equipment, net
 
 
$
12,158


$
9,414


Prototype instruments consist of nCounter instruments used in internal testing and other development activities. Accumulated depreciation on lease and loaner instruments was $1.5 million and $0.9 million at December 31, 2016 and 2015, respectively.
Depreciation and amortization expense related to property and equipment for the years ended December 31, 2016, 2015 and 2014 totaled approximately $2.9 million, $2.3 million and $1.5 million, respectively.