4. Prepaid Expenses and Other Current Assets (Tables)

3 Months Ended

Mar. 31, 2019

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of prepaid expenses and other current assets

	March 31, 2019		December 31, 2018
Collaborative development agreement	$	71,824	$	95,766
Prepaid rent		32,111		31,773
Vendor advances		6,159		7,867
Prepaid service agreements		183,884		174,920
Employee advance and other payroll related items		20,903		16,208
Other prepaid expenses and current assets		257,216		123,306
Total	$	572,097	$	449,840