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Investment Securities Table (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value | $ 14,661 | $ 14,687
Debt Securities, Available-for-sale, Amortized Cost | 30,331 | 27,661
Debt Securities, Available-for-sale, Amortized Cost, Current | 14,661 | 14,687
Debt Securities, Available-for-sale | 30,331 | 27,661
Available-for-sale Debt Security Current [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss | 0 | 0
Long-term Investments [Domain] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Noncurrent | 15,670 | 12,974
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 0 | 0
Debt Securities, Available-for-sale, Noncurrent | $ 15,670 | $ 12,974

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