Fair value disclosures (Tables)

3 Months Ended

Mar. 31, 2017

Fair value disclosures

Fair Value of Financial Assets

The following table presents the Company's assets that are measured at fair value on a recurring basis (in thousands):

	As of March 31, 2017								As of December 31, 2016
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash equivalents and short-term investments:
Money market funds	$	2,306	$	—	$	—	$	2,306	$	199	$	—	$	—	$	199
U.S. government securities		1,498		—		—		1,498		4,998		—		—		4,998
Money market accounts		—		23,809		—		23,809		—		23,809		—		23,809
Corporate debt securities		—		—		—		—		—		9,439		—		9,439
Government agency securities		—		2,243		—		2,243		—		3,757		—		3,757
Sovereign government bonds		—		—		—		—		—		622		—		622
Total	$	3,804	$	26,052	$	—	$	29,856	$	5,197	$	37,627	$	—	$	42,824
Foreign currency forward contracts	$	—	$	*	$	—	$	*	$	—	$	*	$	—	$	*
Mutual funds held in Rabbi Trust, recorded in other long-term assets	$	814	$	—	$	—	$	814	$	622	$	—	$	—	$	622

Fair Value of Financial Liabilities

The following table presents the Company's liabilities that are measured at fair value on a recurring basis (in thousands):

	As of March 31, 2017								As of December 31, 2016
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Rusnano payment derivative	$	—	$	—	$	389	$	389	$	—	$	—	$	389	$	389
Foreign currency forward contracts		—		4		—		4		—		41		—		41
	$	—	$	4	$	389	$	393	$	—	$	41	$	389	$	430