CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS

12 Months Ended

Dec. 31, 2015

Cash And Cash Equivalents [Abstract]

CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS

5. CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS

It is the Company’s policy to mitigate credit risk in its financial assets by maintaining a well-diversified portfolio that limits the amount of exposure as to maturity and investment type. The weighted average maturity of the Company’s available-for-sale securities as of December 31, 2015 and 2014 was approximatelyfour months. The following tables summarize the Company’s cash, cash equivalents and short-term investments for each of the periods indicated:

	As of December 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(in thousands)
Cash and money market funds	$	75,304	$	—	$	—		$	75,304
Commercial paper		48,936		—		(37	)		48,899
Government and government agency bonds		50,966		—		(48	)		50,918
Corporate bonds		17,396		—		(26	)		17,370
Total assets	$	192,602	$	—	$	(111	)	$	192,491
As reported:
Cash and cash equivalents	$	80,304						$	80,304
Short-term investments		112,298				(111	)		112,187
Total assets	$	192,602	$	—	$	(111	)	$	192,491
	As of December 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(in thousands)
Cash and money market funds	$	73,551	$	—	$	—		$	73,551
Commercial paper		2,997		—		—			2,997
Government and government agency bonds		75,289		—		(39	)		75,250
Corporate bonds		58,602		—		(56	)		58,546
Total assets	$	210,439	$	—	$	(95	)	$	210,344
As reported:
Cash and cash equivalents	$	73,551	$	—	$	—		$	73,551
Short-term investments		136,888		—		(95	)		136,793
Total assets	$	210,439	$	—	$	(95	)	$	210,344