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Note 7 - Marketable Securities | 9 Months Ended
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Sep. 30, 2021
Notes to Financial Statements |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] | 7. Marketable Securities The amortized cost and unrealized gains, net of marketable securities as of September 30, 2021 and December 31, 2020, are as follows (in thousands):
|  | As of September 30, 2021 |  |  | As of December 31, 2020 |
Marketable securities: |  |  |  |  |  |  |  |
Amortized cost |  | $ | 114,194 |  |  | $ | 114,531 |
Unrealized gains, net |  |  | 1,134,931 |  |  |  | 592,423 |
Total fair value |  | $ | 1,249,125 |  |  | $ | 706,954 |
During the three months ended September 30, 2021 and 2020, there were net unrealized gains on marketable securities of $457.1 million and net unrealized losses on marketable securities of $76.9 million, respectively. During the nine months ended September 30, 2021 and 2020, the net unrealized gains on marketable securities were $542.5 million and $444.6 million, respectively. These net unrealized gains are included in Gain/(loss) on marketable securities, net on the Company’s Condensed Consolidated Statements of Operations. See Footnote 14 of the Company’s Condensed Consolidated Financial Statements for fair value disclosure.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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