Supplemental Balance Sheet Data

12 Months Ended

Dec. 31, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Balance Sheet Data

4. Supplemental Balance Sheet Data

Prepaid expenses and other current assets consist of the following:

	December 31,
	2014		2013
Prepaid clinical, manufacturing, and scientific costs	$	4,081	$	3,960
Interest receivable		1,018		859
Prepaid insurance		1,238		958
Other		3,601		840
	$	9,938	$	6,617

Other non-current assets consist of the following:

	December 31,
	2014		2013
Restricted cash	$	2,151	$	1,935
Equity method investment	$	2,000		—
Other		123		52
	$	4,274	$	1,987

Restricted cash relates to deposits associated with construction activities at our new Bogart, GA facility and a long-term letter of credit associated with our headquarters in Lexington, MA.

Accrued expenses consist of the following:

	December 31,
	2014		2013
Accrued compensation and benefits	$	6,093	$	3,244
Clinical, manufacturing and scientific costs		12,140		6,587
Professional fees		1,131		568
Other		2,346		722
	$	21,710	$	11,121