Short-term investments (Tables)

9 Months Ended

Sep. 30, 2020

Cash, Cash Equivalents, and Short-term Investments [Abstract]

Schedule of Available-for-sale Securities Reconciliation

The following tables summarize unrealized gains and losses related to our short-term investments designated as available-for-sale debt securities:

	As of September 30, 2020
(In thousands)	(Unaudited)
			Gross		Gross
	Adjusted Cost		Unrealized Gain		Unrealized Loss		Fair Value
Corporate bonds	$	92,610	$	245	$	(2)	$	92,853
Total Short-term investments	$	92,610	$	245	$	(2)	$	92,853

(In thousands)	As of December 31, 2019
			Gross		Gross
	Adjusted Cost		Unrealized Gain		Unrealized Loss		Fair Value
Corporate bonds	$	237,423	$	628	$	(68)	$	237,983
Total Short-term investments	$	237,423	$	628	$	(68)	$	237,983

Investments Classified by Contractual Maturity Date

The following tables summarize the contractual maturities of our short-term investments designated as available-for-sale debt securities:

	As of September 30, 2020
(In thousands)	(Unaudited)
	Adjusted Cost		Fair Value
Due in less than 1 year	$	88,194	$	88,438
Due in 1 to 5 years	4,416		4,415
Total available-for-sale debt securities	$	92,610	$	92,853
Due in less than 1 year	Adjusted Cost		Fair Value
Corporate bonds	$	88,194	$	88,438
Total available-for-sale debt securities	$	88,194	$	88,438
Due in 1 to 5 years	Adjusted Cost		Fair Value
Corporate bonds	$	4,416	$	4,415
Total available-for-sale debt securities	$	4,416	$	4,415