Property and Equipment

12 Months Ended

Dec. 31, 2017

Property Plant And Equipment [Abstract]

Property and Equipment

7. Property and Equipment

The components of property and equipment are as follows (in thousands).

	Year Ended December 31,
	2017			2016
Furniture and equipment	$	16,208		$	15,583
Leasehold improvements		3,877			3,844
Aircraft		190			190
		20,275			19,617
Less: Accumulated depreciation		(17,387	)		(15,404	)
Property and equipment, net	$	2,888		$	4,213

Depreciation expense related to property and equipment was $2.1 million, $2.5 million and $1.8 million for the years ended December 31, 2017, 2016 and 2015, respectively.