Equipment and Improvements

12 Months Ended

Dec. 31, 2018

Property Plant And Equipment [Abstract]

Equipment and Improvements

3. Equipment and Improvements

Equipment and improvements consist of the following (in thousands):

	December 31,
	2018			2017
Computer hardware, software, and equipment	$	14,683		$	14,617
Leasehold improvements		5,316			5,316
Office furniture and fixtures		962			962
		20,961			20,895
Less accumulated depreciation and amortization		(20,096	)		(19,666	)
Equipment and improvements, net	$	865		$	1,229

Depreciation and amortization expense on equipment and improvements was $0.5 million and $0.7 million for the years ended December 31, 2018 and 2017, respectively.