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PROPERTY AND EQUIPMENT, NET
6 Months Ended
Jun. 30, 2011
PROPERTY AND EQUIPMENT, NET [Abstract]  
PROPERTY AND EQUIPMENT, NET
At June 30, 3011 and December 31, 2010, property and equipment, net consists of the following:
 
   
6/30/2011
 
12/31/2010
Production, engineering and other equipment
 
$6,648,307
 
$5,751,832
Leasehold improvements
 
2,904,188
 
2,901,002
Office equipment and furniture
 
577,226
 
577,226
Computer equipment and related software
 
129,899
 
140,246
   
$10,259,620
 
$9,370,306
Accumulated depreciation
 
($6,782,358)
 
($6,455,426)
Property and equipment, net
 
$3,477,262
 
$2,914,880

Depreciation expense was $172,333 and $190,663 for the three months ended June 30, 2011 and June 30, 2010 respectively.  Depreciation expense was $337,278 and $390,710 for the six months ended June 30, 2011 and June 30, 2010 respectively.  During 2011, the company has not sold any equipment.  During 2010, the Company sold equipment with a net book value of $114,160 for a total of $73,800. The Company recognized a loss of $40,359 with respect to such sale of equipment.