Property and Equipment

12 Months Ended

Dec. 31, 2016

4. Property and Equipment

At December 31, 2016 and 2015, net property and equipment at cost consisted of the following:


	December 31,
(In thousands)	2016		2015
Leasehold improvements	$	671	$	603
Laboratory equipment and other		5,127		4,543
Total property and equipment, at cost		5,798		5,146
Less: Accumulated depreciation and amortization		3,945		3,454
Property and equipment, net	$	1,853	$	1,692

Depreciation and amortization expense on Property and equipment was approximately $0.6 million, $0.5 million and $0.2 million in 2016, 2015 and 2014, respectively. As of December 31, 2016, Property and equipment includes $0.4 million of equipment that was received in December 2016, but was not in service as of December 31, 2016. As this equipment was unpaid at December 31, 2016, the $0.4 million payment due is reported in Accrued expenses.