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Property and Equipment
6 Months Ended
Jun. 30, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Disclosure [Text Block]
2.
Property and Equipment
 
Property and equipment are stated at cost less accumulated depreciation and amortization (in thousands) and consist of the following:
 
 
 
June 30,
 
December 31,
 
 
 
2015
 
2014
 
Equipment
 
$
13,709
 
$
13,719
 
Software
 
 
4,987
 
 
4,863
 
Furniture and equipment
 
 
2,359
 
 
2,348
 
Leasehold improvements
 
 
4,941
 
 
4,919
 
Total
 
 
25,996
 
 
25,849
 
Less: accumulated depreciation and amortization
 
 
(20,740)
 
 
(19,934)
 
 
 
$
5,256
 
$
5,915
 
 
Depreciation and amortization expense of property and equipment was approximately $0.5 million and $0.6 million for the three months ended June 30, 2015 and 2014, respectively. Depreciation and amortization expense of property and equipment was approximately $1.0 million and $1.4 million for the six months ended June 30, 2015 and 2014, respectively.