3. ACCOUNTS RECEIVABLE, AND DEFERRED REVENUE

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

ACCOUNTS RECEIVABLE, AND DEFERRED REVENUE

3. ACCOUNTS RECEIVABLE AND DEFERRED REVENUE

Accounts Receivable

The Company records accounts receivable as it bills its customers for products and services. The allowance for doubtful accounts is based upon the Company’s policy (See Note 1). The bad debt expense was $2,429 and $0 for the years ended December 31, 2019 and 2018, respectively.

Deferred Revenue

Deferred revenues are deposits from customers for product sales which have not yet been delivered and multi period maintenance contracts (See Note 1 and 16). Deferred revenue was $93,609 and $835,785 at December 31, 2019 and December 31, 2018, respectively.