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Property and Equipment, Net, and Other Assets
6 Months Ended
Jun. 30, 2015
Property Plant And Equipment [Abstract]  
Property and Equipment, Net, and Other Assets

3. Property and Equipment, Net, and Other Assets

At June 30, 2015 and December 31, 2014, property and equipment, net, and other assets consisted of the following:

 

 

 

June 30,

 

 

December 31,

 

 

 

2015

 

 

2014

 

 

 

(Unaudited)

 

 

 

 

 

Property and equipment, net of accumulated depreciation of $1,839,216

     and $1,692,835 as of June 30, 2015 and December 31, 2014,

     respectively

 

$

622,752

 

 

$

533,837

 

Security deposits and other assets

 

 

227,647

 

 

 

219,656

 

    Property and equipment, net, and other assets

 

$

850,399

 

 

$

753,493

 

 

We compute depreciation using the straight-line method over the estimated useful lives of the property and equipment. The depreciation expense related to property and equipment was $70,335 and $72,894 for the three months ended June 30, 2015 and 2014, respectively.  The depreciation expense related to property and equipment was $146,381 and $142,461 for the six months ended June 30, 2015 and 2014, respectively.