Accrued Liabilities

6 Months Ended

Jun. 30, 2018

Accrued Liabilities [Abstract]

Accrued Liabilities

8.

Accrued Liabilities

At June 30, 2018 and December 31, 2017, accrued liabilities consisted of the following:

	June 30, 2018		December 31, 2017
	(Unaudited)
Accrued vacation and benefits	$	68,107	$	69,025
Accrued expenses relating to vendors and others		156,309		136,681
Accrued warranty costs		20,000		20,000
Accrued interest payable relating to stockholder notes		160,591		115,039
Deferred rent		15,727		22,059
	$	420,734	$	362,804