Annual report pursuant to Section 13 and 15(d)

Short-term Investments

Short-term Investments

12 Months Ended

Dec. 31, 2019

Investments Debt And Equity Securities [Abstract]

3.	Short-term Investments

The following table summarizes the held-to-maturity securities held at December 31, 2019 and 2018 (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
As of December 31, 2019
U.S. government securities	$	1,996	$	15	$	(14	)	$	1,997
Commercial paper		998		—		—			998
Overnight repurchase agreement		3,500		—		—			3,500
Total short-term investments	$	6,494	$	15	$	(14	)	$	6,495

	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
As of December 31, 2018
U.S. government securities	$	14,946	$	14	$	(15	)	$	14,945
Commercial paper		8,772		—		—			8,772
Overnight repurchase agreement		9,000		—		—			9,000
Total short-term investments	$	32,718	$	14	$	(15	)	$	32,717

As of December 31, 2019, the Company has $6.5 million of held-to-maturity investments with contractual maturities less than one year. The gross unrealized gains and losses for the Company's commercial paper and overnight repurchase agreement are not significant. The Company carries short-term investments at amortized cost. The fair value of the short-term investments is determined based on “Level 1” inputs, which consist of quoted prices in active markets for identical assets.