Fair value measurements

9 Months Ended

Sep. 30, 2017

Fair value measurements

Fair value measurements

4. Fair value measurements

The following table presents information about the Company's assets and liabilities regularly measured and carried at a fair value and indicates the level within fair value hierarchy of the valuation techniques utilized to determine such value as of September 30, 2017 and December 31, 2016:

					Significant
			Quoted Prices		Other		Significant
			in Active		Observable		Unobservable
	Fair		Markets		Inputs		Inputs
	Value		(Level 1)		(Level 2)		(Level 3)
September 30, 2017
Cash and cash equivalents	$	50,756	$	50,756	$	—	$	—
Marketable securities:
U.S. Treasuries		41,783		41,783		—		—
Commercial paper		33,254		—		33,254		—
Corporate bonds		11,067		—		11,067		—
	$	136,860	$	92,539	$	44,321	$	—

					Significant
			Quoted Prices		Other		Significant
			in Active		Observable		Unobservable
	Fair		Markets		Inputs		Inputs
	Value		(Level 1)		(Level 2)		(Level 3)
December 31, 2016
Cash and cash equivalents	$	100,297	$	100,297	$	—	$	—
	$	100,297	$	100,297	$	—	$	—

There were no changes in valuation techniques or transfers between fair value measurement levels during the nine months ended September 30, 2017 and 2016. As of September 30, 2017 and December 31, 2016, cash and cash equivalents were comprised of cash and money market funds.