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Financial Instruments and Fair Value Measurements - Equity Investment in InCarda (Details) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 09, 2022 USD ($) | Mar. 31, 2022 USD ($) Director $ / shares shares | Mar. 31, 2021 USD ($) | Sep. 30, 2020 USD ($) shares | Dec. 31, 2021 USD ($) shares
Equity Investment |  |  |  |  |
Equity and long-term investments |  | $ 544,437,000 |  |  | $ 483,845,000
Preferred stock, shares issued | shares |  | 0 |  |  | 0
InCarda |  |  |  |  |
Equity Investment |  |  |  |  |
Number of Investee's Board members currently representing the Company | Director |  | 1 |  |  |
Number of the Investee's Board members | Director |  | 8 |  |  |
Equity investment ownership percentage |  | 13.00% |  |  | 13.00%
Unrealized loss from fair value changes in equity investments |  |  | $ 500,000 |  |
Unrealized gain from fair value changes in equity investments |  | $ 600,000 |  |  |
InCarda | Series C preferred stock and warrants |  |  |  |  |
Equity Investment |  |  |  |  |
Amount of securities purchase agreement |  |  |  | $ 15,800,000 |
InCarda | Warrants |  |  |  |  |
Equity Investment |  |  |  |  |
Maximum number of additional shares into which warrants may be converted under the securities purchase agreement | shares |  |  |  | 5,117,358 |
Equity and long-term investments at fair value |  | $ 1,000,000.0 |  |  | $ 400,000
Exercise price of warrants | $ / shares |  | $ 0.7328 |  |  |
Extended expiration date |  | Mar. 31, 2023 |  |  |
InCarda | Series C preferred stock |  |  |  |  |
Equity Investment |  |  |  |  |
Transaction cost |  |  |  | $ 800,000 |
Impairment of equity investments |  | $ 0 |  |  | 0
Preferred stock, shares issued | shares |  |  |  | 20,469,432 |
InCarda Convertible Note |  |  |  |  |
Equity Investment |  |  |  |  |
Equity and long-term investments at fair value |  | $ 700,000 |  |  |
Debt Instrument, annual interest rate | 6.00% |  |  |  |
Gross Proceeds from sale of equity | $ 10,000,000.0 |  |  |  |
Debt instrument principal amount percentage |  | 100.00% |  |  |
InCarda Convertible Note | Series C preferred stock |  |  |  |  |
Equity Investment |  |  |  |  |
Equity and long-term investments |  | $ 16,500,000 |  |  | $ 15,800,000
InCarda 2022 Warrants |  |  |  |  |
Equity Investment |  |  |  |  |
Amount of securities purchase agreement | $ 700,000 |  |  |  |

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- Definition The number of the Company's Board members currently serving on the Investee's Board. + References No definition available. + Details
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- Definition The amount the Company agreed to pay for common stock and warrants upon satisfaction of certain closing conditions under the terms of the securities purchase agreement. + References No definition available. + Details
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- Definition The maximum number of additional common stock shares into which the warrants may be converted. + References No definition available. + Details
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=124268079&loc=d3e32787-111569 + Details
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