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FAIR VALUE MEASUREMENTS (Tables) | 6 Months Ended
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Jun. 30, 2021
Fair Value Disclosures [Abstract] |
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis |
| June 30, 2021 |  | December 31, 2020
| (In thousands)
| Level 1 |  | Level 2 |  | Level 3 |  | Level 1 |  | Level 2 |  | Level 3
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |
Money market funds | $ | 1,277,860 |  |  | $ | — |  |  | $ | — |  |  | $ | 654,699 |  |  | $ | — |  |  | $ | — |
Other assets |  |  |  |  |  |  |  |  |  |  |
Investments in debt securities | — |  |  | — |  |  | 47,369 |  |  | — |  |  | — |  |  | — |
Total assets measured at fair value | $ | 1,277,860 |  |  | $ | — |  |  | $ | 47,369 |  |  | $ | 654,699 |  |  | $ | — |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Accrued liabilities |  |  |  |  |  |  |  |  |  |  |
Contingent consideration | $ | — |  |  | $ | — |  |  | $ | 3,596 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Warranty obligations |  |  |  |  |  |  |  |  |  |  |
Current | — |  |  | — |  |  | 10,759 |  |  | — |  |  | — |  |  | 8,267 |
Non-current | — |  |  | — |  |  | 27,278 |  |  | — |  |  | — |  |  | 20,469 |
Total warranty obligations measured at fair value | — |  |  | — |  |  | 38,037 |  |  | — |  |  | — |  |  | 28,736 |
Total liabilities measured at fair value | $ | — |  |  | $ | — |  |  | $ | 41,633 |  |  | $ | — |  |  | $ | — |  |  | $ | 28,736 |
Summary of Significant Unobservable Inputs used in the Fair Value Measurement of Assets Designated as Level 3 | The changes in the balance in investments in debt securities during the period are as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2021 |  |  |  | 2021 |  |  |  |
| (In thousands)
Balance at beginning of period | $ | 26,437 |  |  |  |  | $ | — |  |  |  |  |
Investment | 20,000 |  |  |  |  | 45,000 |  |  |  |  |
Fair value adjustments included in other (expense) income, net | 932 |  |  |  |  | 2,369 |  |  |  |  |
Balance at end of period | $ | 47,369 |  |  |  |  | $ | 47,369 |  |  |  |  |
Schedule of Changes in Nonfinancial Liabilities Related to Warrant Obligations Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs | The following table reflects the activity for the Company’s contingent consideration liabilities measured at fair value using Level 3 inputs for the three and six months ended June 30, 2021:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2021 |  |  |  | 2021 |  |  |  |
| (In thousands)
Balance at beginning of period | $ | 3,540 |  |  |  |  | $ | — |  |  |  |  |
Addition | — |  |  |  |  | 3,500 |  |  |  |  |
Fair value adjustments included in other income (expense), net | 56 |  |  |  |  | 96 |  |  |  |  |
Balance at end of period | $ | 3,596 |  |  |  |  | $ | 3,596 |  |  |  |  |
The following table provides information regarding changes in nonfinancial liabilities related to the Company’s warranty obligations measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the periods indicated.
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020 |  |
| (In thousands)
Balance at beginning of period | $ | 33,319 |  |  | $ | 20,425 |  |  | $ | 28,736 |  |  | $ | 19,806 |  |  |
Accruals for warranties issued during period | 3,319 |  |  | 766 |  |  | 7,213 |  |  | 2,290 |  |  |
Changes in estimates | 2,755 |  |  | 983 |  |  | 5,338 |  |  | 1,598 |  |  |
Settlements | (1,910) |  |  | (1,511) |  |  | (3,825) |  |  | (3,504) |  |  |
Increase due to accretion expense | 1,104 |  |  | 804 |  |  | 2,047 |  |  | 1,578 |  |  |
Other | (550) |  |  | (335) |  |  | (1,472) |  |  | (636) |  |  |
Balance at end of period | $ | 38,037 |  |  | $ | 21,132 |  |  | $ | 38,037 |  |  | $ | 21,132 |  |  |
Summary of Significant Unobservable Inputs used in the Fair Value Measurement of Liabilities Designated as Level 3 | As of June 30, 2021 and December 31, 2020, the significant unobservable inputs used in the fair value measurement of the Company’s liabilities designated as Level 3 are as follows:
|  |  |  |  |  | Percent Used (Weighted Average)
Item Measured at Fair Value |  | Valuation Technique |  | Description of Significant Unobservable Input |  | June 30, 2021 |  | December 31, 2020
Warranty obligations for microinverters sold since January 1, 2014 |  | Discounted cash flows |  | Profit element and risk premium |  | 15% |  | 15%
|  | Credit-adjusted risk-free rate |  | 13% |  | 13%

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique used to measure similar asset in prior period by class of asset or liability on non-recurring basis. + 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 (bbb) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: 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=123874694&loc=d3e19279-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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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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