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FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures Abstract

Fair value of marketable securities and investments

The fair-value hierarchy of the Company’s cash equivalents and marketable securities at September 30, 2021, and December 31, 2020, was as follows:

​	​	​	​	​	​	​	​	​	​
​	​	Fair Value Measurement at
​	​	September 30, 2021
​		​	​		Quoted Prices in			​	​
​	​	​	​	​	Active Markets for		​	Significant Other
​	​	​	​	​	Identical Assets		​	Observable Inputs
(In thousands)	​	Total Fair Value		​	(Level 1)		​	(Level 2)
Commercial paper	​	$	282,192	​	$	—	​	$	282,192
Corporate securities	​	​	178,067	​	​	—	​	​	178,067
Money market funds	​		22,028	​		22,028	​		—
Total	​	$	482,287	​	$	22,028	​	$	460,259

​

​	​	​	​	​	​	​	​	​	​
​	​	Fair Value Measurement at
​	​	December 31, 2020
​		​	​		Quoted Prices in			​	​
​	​	​	​	​	Active Markets for		​	Significant Other
​	​	​	​	​	Identical Assets		​	Observable Inputs
(In thousands)	​	Total Fair Value		​	(Level 1)		​	(Level 2)
Commercial paper	​	$	253,855	​	$	—	​	$	253,855
Corporate securities	​	​	146,658	​	​	—	​	​	146,658
Money market funds	​		1,634	​		1,634	​		—
Total	​	$	402,147	​	$	1,634	​	$	400,513

X

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2C
-URI http://asc.fasb.org/extlink&oid=117815213&loc=SL7498348-110258

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- References

No definition available.

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