Property and Equipment

6 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]

Property and Equipment

3. Property and Equipment

Property and equipment was:

	June 30, 2018		December 31,2017
Equipment	$	179,900	$	258,700
Furniture		1,600		190,600
Leasehold improvements		167,600		167,600
		349,100		355,800
Less: accumulated depreciation and amortization		336,800		325,000
	$	12,300	$	30,800

Aggregate property and equipment depreciation and amortization expense was $8,900 during the three-month period ended June 30, 2018, and $17,800 during the six-month period ended June 30, 2018. During the six month period ended June 30, 2017, we disposed equipment and furniture with a combined net book value of $700.