Short-Term Investments (Tables)

3 Months Ended

Mar. 31, 2019

Short-Term Investments

Summary of short-term investments securities

The following table summarizes the short-term investments securities held at March 31, 2019 and December 31, 2018 (in thousands):

			Gross Unrealized		Gross Unrealized
	Amortized Cost		Gains		Losses		Fair Value
March 31, 2019
Corporate debt securities	$	2,012	$	—	$	—	$	2,012
Reverse repurchase agreements		38,000		—		—		38,000
Total	$	40,012	$	—	$	—	$	40,012

			Gross Unrealized		Gross Unrealized
	Amortized Cost		Gains		Losses		Fair Value
December 31, 2018
Corporate debt securities	$	7,280	$	—	$	(4)	$	7,276
Reverse repurchase agreements		15,000		—		—		15,000
Total	$	22,280	$	—	$	(4)	$	22,276