Investments

9 Months Ended

Sep. 30, 2020

Investments Debt And Equity Securities [Abstract]

Investments

4. Investments

Investments by security type consisted of the following at September 30, 2020 and December 31, 2019 (in thousands):

	September 30, 2020
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Investments:
Commercial paper	$	6,245	$	—	$	—		$	6,245
Corporate bonds		2,021		—		—			2,021
Government securities		104,718		4		(2	)		104,720
	$	112,984	$	4	$	(2	)	$	112,986

	December 31, 2019
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Investments:
Commercial Paper	$	11,957	$	—	$	—		$	11,957
Corporate Bonds		17,732		3		(2	)		17,733
	$	29,689	$	3	$	(2	)	$	29,690

Investments with original maturities of less than 90 days are included in cash and cash equivalents on the condensed consolidated balance sheets and are not included in the table above. Investments with maturities of less than 12 months are considered current and those investments with maturities greater than 12 months are considered non-current assets.

Excluded from the table above in a restricted investment of $1,400 as the cost approximates current fair value.

The amortized cost and fair value of investments in commercial paper, corporate bonds and government securities by contractual maturity, as of September 30, 2020 were as follows (in thousands):

	Available-for-Sale
	Cost		Fair Value
Due in 1-year or less	$	90,586	$	90,588
Due after 1-year through 5-years		22,398		22,398
	$	112,984	$	112,986