XML 37 R17.htm IDEA: XBRL DOCUMENT
v3.20.2

Fair Value of Financial Instruments (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
Fair Value Disclosures [Abstract] |
Fair Values of Financial Instruments Measured on a Recurring Basis | The fair values of the financial instruments we measure at fair value on a recurring basis are as follows (in thousands):
| September 30, 2020
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Cash equivalents: |  |  |  |  |  |  |
Money market funds | $ | 316,736 |  |  | $ | — |  |  | $ | — |  |  | $ | 316,736 |
Commercial paper | — |  |  | 78,479 |  |  | — |  |  | 78,479 |
Certificates of deposit | — |  |  | 12,010 |  |  | — |  |  | 12,010 |
Corporate bonds | — |  |  | 3,347 |  |  | — |  |  | 3,347 |
Marketable securities: |  |  |  |  |  |  |
Corporate bonds | — |  |  | 415,998 |  |  | — |  |  | 415,998 |
U.S. treasury securities | 271,930 |  |  | — |  |  | — |  |  | 271,930 |
Commercial paper | — |  |  | 169,619 |  |  | — |  |  | 169,619 |
Certificates of deposit | — |  |  | 73,213 |  |  | — |  |  | 73,213 |
Asset-backed securities | — |  |  | 33,655 |  |  | — |  |  | 33,655 |
U.S. agency bonds | — |  |  | 15,992 |  |  | — |  |  | 15,992 |
Non-U.S. government and supranational bonds | — |  |  | 15,985 |  |  | — |  |  | 15,985 |
Prepaid expenses and other current assets: |  |  |  |  |  |  |
Certificates of deposit | — |  |  | 1,470 |  |  | — |  |  | 1,470 |
Restricted cash: |  |  |  |  |  |  |
Certificates of deposit | $ | — |  |  | $ | 9,221 |  |  | $ | — |  |  | $ | 9,221 |
| December 31, 2019
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Cash equivalents: |  |  |  |  |  |  |
Money market funds | $ | 214,413 |  |  | $ | — |  |  | $ | — |  |  | $ | 214,413 |
Commercial paper | — |  |  | 105,354 |  |  | — |  |  | 105,354 |
Corporate bonds | — |  |  | 3,791 |  |  | — |  |  | 3,791 |
Certificates of deposit | — |  |  | 2,914 |  |  | — |  |  | 2,914 |
Marketable securities: |  |  |  |  |  |  |
Corporate bonds | — |  |  | 450,433 |  |  | — |  |  | 450,433 |
U.S. treasury securities | 201,640 |  |  | — |  |  | — |  |  | 201,640 |
Commercial paper | — |  |  | 196,328 |  |  | — |  |  | 196,328 |
Asset-backed securities | — |  |  | 114,599 |  |  | — |  |  | 114,599 |
Certificates of deposit | — |  |  | 100,679 |  |  | — |  |  | 100,679 |
Prepaid expenses and other current assets: |  |  |  |  |  |  |
Certificates of deposit | — |  |  | 2,738 |  |  | — |  |  | 2,738 |
Restricted cash: |  |  |  |  |  |  |
Certificates of deposit | $ | — |  |  | $ | 25,339 |  |  | $ | — |  |  | $ | 25,339 |
Fair Value of Marketable Securities by Contractual Maturity | The fair value of our marketable securities by contractual maturity is as follows (in thousands):
| September 30, 2020
Due in one year or less | $ | 731,474 |
Due after one to five years | 264,918 |
Total | $ | 996,392 |

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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=117815213&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=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration