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Restructuring Charges (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019
Restructuring and related cost, positions eliminated |  |  |  |  |  |
Restructuring charges | $ 0 | $ 0 | $ 368 | $ 836 |  |
2020 Restructuring plan |  |  |  |  |  |
Restructuring and related cost, positions eliminated |  |  |  |  |  |
Restructuring, number of positions eliminated |  |  |  |  | 70 |
Restructuring charges |  |  | $ 400 |  |  |
2019 Restructuring plan |  |  |  |  |  |
Restructuring and related cost, positions eliminated |  |  |  |  |  |
Restructuring, number of positions eliminated |  |  |  |  |  | 80
Restructuring charges |  |  |  |  | $ 800 |

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