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Deferred Revenue
3 Months Ended
Mar. 31, 2013
Deferred Revenue [Abstract]  
Deferred Revenue

8. Deferred Revenue

Deferred revenue consists of the following:

 

 

 

 

 

 

March 31,

 

December 31,

 

2013

 

2012

 

 

 

 

Product shipped, revenue deferred

$      3,510,417

 

$      3,206,641

Customer deposits

466,904 

 

558,227 

Deferred service and license fees

6,325,892 

 

6,215,230 

 

10,303,213 

 

9,980,098 

Less: Long-term deferred revenue

(359,606)

 

(477,159)

Total current deferred revenue

$      9,943,607

 

$      9,502,939