Accrued Liabilities

3 Months Ended

Mar. 31, 2018

Accrued Liabilities [Abstract]

Accrued Liabilities

8.

Accrued Liabilities

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

	March 31, 2018		December 31, 2017
	(Unaudited)
Accrued vacation and benefits	$	66,916	$	69,025
Accrued expenses relating to vendors and others		132,094		136,681
Accrued warranty costs		20,000		20,000
Accrued interest payable relating to stockholder notes		128,549		115,039
Deferred rent		19,345		22,059
	$	366,904	$	362,804