Property and Equipment, Net

3 Months Ended

Mar. 31, 2016

Property Plant And Equipment [Abstract]

4.	Property and Equipment, Net

Property and equipment, net consisted of the following:

	March 31, 2016			December 31, 2015
Laboratory equipment	$	4,739		$	4,370
Computer equipment		715			408
Furniture and office equipment		498			285
Leasehold improvements		4,055			1,856
Construction in progress		7,472			1,843
		17,479			8,762
Less: Accumulated depreciation and amortization		(1,397	)		(1,011	)
	$	16,082		$	7,751

Construction in progress at March 31, 2016 was comprised primarily of leasehold improvements, laboratory equipment, and computer equipment purchased in connection with the build-out of office and laboratory space at our new headquarters at 200 Sidney Street in Cambridge, Massachusetts.

Depreciation and amortization expense was $386 and $92 for the three months ended March 31, 2016 and 2015, respectively.