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FAIR VALUE OF CERTAIN FINANCIAL ASSETS AND LIABILITIES (Tables) | 3 Months Ended
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Mar. 31, 2022
FAIR VALUE OF CERTAIN FINANCIAL ASSETS AND LIABILITIES |
Schedule of financial assets and liabilities recorded at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
March 31, 2022 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Cash | ​ | $ | 748,324 | ​ | $ | — | ​ | $ | — | ​ | $ | 748,324
Money market funds | ​ |  | 138,161 | ​ |  | — | ​ |  | — | ​ |  | 138,161
Certificates of deposit | ​ | ​ | — | ​ | ​ | 38,411 | ​ | ​ | — | ​ | ​ | 38,411
Commercial paper | ​ |  | — | ​ |  | 290,410 | ​ |  | — | ​ |  | 290,410
Municipal securities | ​ |  | — | ​ |  | 202,667 | ​ |  | — | ​ |  | 202,667
U.S. government agency securities | ​ |  | — | ​ |  | 99,786 | ​ |  | — | ​ |  | 99,786
U.S. treasuries | ​ | ​ | — | ​ | ​ | 1,280,327 | ​ | ​ | — | ​ | ​ | 1,280,327
Foreign currency derivatives | ​ |  | — | ​ |  | (4,483) | ​ |  | — | ​ |  | (4,483)
Total | ​ | $ | 886,485 | ​ | $ | 1,907,118 | ​ | $ | — | ​ | $ | 2,793,603
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts included in: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and cash equivalents | ​ | $ | 886,485 | ​ | $ | 128,301 | ​ | $ | — | ​ | $ | 1,014,786
Short-term investments | ​ |  | — | ​ |  | 1,717,648 | ​ |  | — | ​ |  | 1,717,648
Accounts receivable, net | ​ |  | — | ​ |  | 239 | ​ |  | — | ​ |  | 239
Investments | ​ |  | — | ​ |  | 65,652 | ​ |  | — | ​ |  | 65,652
Accrued liabilities | ​ |  | — | ​ |  | (4,722) | ​ |  | — | ​ |  | (4,722)
Total | ​ | $ | 886,485 | ​ | $ | 1,907,118 | ​ | $ | — | ​ | $ | 2,793,603
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2021 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Cash | ​ | $ | 749,089 | ​ | $ | — | ​ | $ | — | ​ | $ | 749,089
Money market funds | ​ |  | 440,826 | ​ |  | — | ​ |  | — | ​ |  | 440,826
Certificates of deposit | ​ | ​ | — | ​ | ​ | 44,502 | ​ | ​ | — | ​ | ​ | 44,502
Commercial paper | ​ |  | — | ​ |  | 335,477 | ​ |  | — | ​ |  | 335,477
Municipal securities | ​ |  | — | ​ |  | 2,428 | ​ |  | — | ​ |  | 2,428
U.S. government agency securities | ​ |  | — | ​ |  | 75,137 | ​ |  | — | ​ |  | 75,137
U.S. treasuries | ​ | ​ | — | ​ | ​ | 1,528,149 | ​ | ​ | — | ​ | ​ | 1,528,149
Foreign currency derivatives | ​ |  | — | ​ |  | (278) | ​ |  | — | ​ |  | (278)
Total | ​ | $ | 1,189,915 | ​ | $ | 1,985,415 | ​ | $ | — | ​ | $ | 3,175,330
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts included in: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and cash equivalents | ​ | $ | 1,189,915 | ​ | $ | 136,547 | ​ | $ | — | ​ | $ | 1,326,462
Short-term investments | ​ |  | — | ​ |  | 1,749,727 | ​ |  | — | ​ |  | 1,749,727
Accounts receivable, net | ​ |  | — | ​ |  | 654 | ​ |  | — | ​ |  | 654
Investments | ​ |  | — | ​ |  | 99,419 | ​ |  | — | ​ |  | 99,419
Accrued liabilities | ​ |  | — | ​ |  | (932) | ​ |  | — | ​ |  | (932)
Total | ​ | $ | 1,189,915 | ​ | $ | 1,985,415 | ​ | $ | — | ​ | $ | 3,175,330
​

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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