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Property and Equipment
6 Months Ended
Jun. 30, 2013
Property, Plant and Equipment [Abstract]  
Property and Equipment
Property and Equipment
 
The net carrying value of property and equipment was as follows:
 
June 30, 2013
 
December 31, 2012
Furniture and fixtures
$
67,341

 
$
421,425

Equipment
2,718,555

 
2,473,813

Software
7,663,089

 
8,018,509

Leasehold improvements
73,630

 
348,159

Subtotal
$
10,522,615

 
$
11,261,906

Less: accumulated depreciation and amortization
(8,979,081
)
 
(9,151,135
)
Total
$
1,543,534

 
$
2,110,771



During the three and six months ended June 30, 2013 depreciation expense was $504,567 and $1,210,034, respectively. During the three and six months ended June 30, 2012, depreciation expense was $693,267 and $1,135,572, respectively.