Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value of Financial Instruments

Schedule of the entity's financial assets and liabilities at fair value

The following tables set forth the fair value of the Company’s cash equivalents and short-term investments by level within the fair value hierarchy (in thousands):

	As of December 31, 2015
	Fair Value		Level I		Level II		Level III
Assets:
Money market funds	$	98	$	98	$	—	$	—
Corporate debt securities and commercial paper		23,656		—		23,656		—
Total assets measured at fair value	$	23,754	$	98	$	23,656	$	—

	As of December 31, 2014
	Fair Value		Level I		Level II		Level III
Assets:
Money market funds	$	16,376	$	16,376	$	—	$	—
Corporate debt securities and commercial paper		43,304		—		43,304		—
Total assets measured at fair value	$	59,680	$	16,376	$	43,304	$	—

Schedule of cash, cash equivalents, and short-term investments

	As of December 31, 2015
	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value
Assets:
Cash	$	11,578	$	—	$	—	$	11,578
Money market funds		98		—		—		98
Corporate debt securities and commercial paper		23,680		—		(24)		23,656
Total cash, cash equivalents and short-term investments	$	35,356	$	—	$	(24)	$	35,332