16. REVENUES

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

REVENUES

16. REVENUES

For each of the identified periods, revenues can be categorized into the following:

	For the year ended December 31,
	2019		2018
Product Sales	$	5,091,571	$	6,144,251
Maintenance Fees		13,055		7,576
Professional Services		6,919		10,575
Total Revenues	$	5,111,545	$	6,162,402

At December 31, 2019 and 2018, deferred revenue amounted to $93,609 and $835,785, respectively. $765,609 of 2018 deferred amounts were recorded to revenue in 2019. These amounts represented customer deposits in the amount of $35,520 and $791,913 for December 31, 2019 and 2018, respectively and prepaid multi-year maintenance plans for previously sold products which account for $58,089 and $43,872 for December 31, 2019 and 2018, respectively and pertain to services to be provided through 2024.