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v3.22.2

Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021 | Jan. 01, 2022 | Nov. 15, 2019
Tax expense (benefit) for unrealized holding gain (loss) on available-for-sale investments | $ 0 | $ 0 | $ 0 | $ 0 |  |  |
Accounting Standards Update [Extensible Enumeration] |  |  |  |  | Accounting Standards Update 2020-06 [Member] |  |
3.25% Convertible Notes | Convertible Debt |  |  |  |  |  |  |
Stated interest rate |  | 3.25% |  | 3.25% |  |  |
1.75% Convertible Notes | Convertible Debt |  |  |  |  |  |  |
Stated interest rate | 1.75% |  | 1.75% |  |  | 1.75% | 1.75%

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