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FAIR VALUE MEASUREMENTS (Tables) | 9 Months Ended
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Sep. 30, 2023
FAIR VALUE MEASUREMENTS |
Schedule of Fair value of cash equivalents and marketable securities | The fair-value hierarchy of the Company’s cash equivalents and marketable securities at September 30, 2023 and December 31, 2022, was as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement at
​ | ​ | September 30, 2023
​ |  | ​ | ​ |  | Quoted Prices in |  | ​ | ​
​ | ​ | ​ | ​ | ​ | Active Markets for | ​ | Significant Other
​ | ​ | ​ | ​ | ​ | Identical Assets | ​ | Observable Inputs
(In thousands) | ​ | Total Fair Value | ​ | (Level 1) | ​ | (Level 2)
Commercial paper | ​ | $ | 39,539 | ​ | $ | — | ​ | $ | 39,539
Corporate securities | ​ | ​ | 261,896 | ​ | ​ | — | ​ | ​ | 261,896
Money market funds | ​ |  | 781 | ​ |  | 781 | ​ |  | —
Total | ​ | $ | 302,216 | ​ | $ | 781 | ​ | $ | 301,435
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement at
​ | ​ | December 31, 2022
​ |  | ​ | ​ |  | Quoted Prices in |  | ​ | ​
​ | ​ | ​ | ​ | ​ | Active Markets for | ​ | Significant Other
​ | ​ | ​ | ​ | ​ | Identical Assets | ​ | Observable Inputs
(In thousands) | ​ | Total Fair Value | ​ | (Level 1) | ​ | (Level 2)
Commercial paper | ​ | $ | 58,683 | ​ | $ | — | ​ | $ | 58,683
Corporate securities | ​ | ​ | 248,441 | ​ | ​ | — | ​ | ​ | 248,441
Money market funds | ​ |  | 363 | ​ |  | 363 | ​ |  | —
Total | ​ | $ | 307,487 | ​ | $ | 363 | ​ | $ | 307,124

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- 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 -Name Accounting Standards Codification -Section 50 -Paragraph 2C -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2C Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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