Deferred Revenue

6 Months Ended

Jun. 30, 2019

Revenue Recognition and Deferred Revenue [Abstract]

Deferred Revenue

NOTE 10 – 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. Activity during the six months ended June 30, 2019 and 2018 was as follows:

	June 30, 2019			June 30, 2018
Balance, beginning of period	$	1,073,014		$	1,302,717
Additions		932,397			5,795,660
Amortization		(1,556,273	)		(5,204,086	)
Balance, ending of period		449,138			1,894,291
Deferred revenue – short-term		333,732			1,726,718
Deferred revenue – long-term	$	115,406		$	167,573