Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Carrying Value and Estimated Fair Value of Financial Instruments

The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure:

	December 31,				March 31,
	2019				2020
	Carrying		Fair		Carrying		Fair
	amount		value		amount		value
	(In thousands)
Cash and cash equivalents	$	63,255	$	63,255	$	64,046	$	64,046
Accounts receivable, net		11,870		11,870		15,232		15,232
Accounts payable		2,514		2,514		2,778		2,778