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Deferred Revenue
3 Months Ended
Mar. 31, 2018
Revenue Recognition and Deferred Revenue [Abstract]  
Deferred Revenue

NOTE 9 – DEFERRED REVENUE

 

The Company has future performance obligations for separately priced extended warranties sold related to its Lamps for Life program and advances from customers. Deferred revenue consisted of the following as of March 31, 2018 and December 31, 2017:

 

    March 31, 2018     December 31, 2017  
             
Balance, beginning of the period   $ 1,302,717     $ 767,726  
Additions     71,903       1,070,528  
Amortization or earned     (715,462 )     (535,537 )
Balance, ending of the period     659,158       1,302,717  
                 
Deferred revenue – short-term     483,243       1,127,423  
Deferred revenue – long-term   $ 175,915     $ 175,294