Short-term investments

12 Months Ended

Dec. 31, 2017

Short-term investments

Short-term investments

3. Short-term investments

        The Company's short-term investments were as follows:

	As of December 31, 2017
(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Short-term investments:
Available-for-sale securities	$	76	$	—	$	(26	)	$	50
Term deposits		60		—		—			60
Total	$	136	$	—	$	(26	)	$	110

	As of December 31, 2016
(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Short-term investments:
Available-for-sale securities	$	51,094	$	—	$	(18	)	$	51,076
Term deposits		30		—		—			30
Total	$	51,124	$	—	$	(18	)	$	51,106

        As of December 31, 2017 and 2016 the Company's short-term investments were classified as available-for-sale and comprised a (i) money market fund that invests all of its assets, excluding cash and deposits, in short term USD-denominated debt securities, and (ii) a U.S. treasury note.