Property and Equipment

9 Months Ended

Sep. 30, 2017

Property, Plant and Equipment [Abstract]

Property and Equipment

4. Property and Equipment

Property and equipment was:

	September 30, 2017		December 31, 2016
Equipment	$	184,600	$	258,700
Furniture		3,600		190,600
Leasehold improvements		167,600		167,600
		355,800		616,900
Less: accumulated depreciation and amortization		316,000		473,600
	$	39,800	$	143,300

Aggregate property and equipment depreciation and amortization expense was $8,900 and $42,200 during the three-month period and nine-month ended September 30, 2017, respectively, and $21,200 and $70,800 during the same periods ended September 30, 2016. During the nine-month periods ended September 30, 2017 and 2016, we disposed of equipment and furniture with a combined net book value of $61,300 and $20,100, respectively.