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Commitments and Contingencies (Details) $ in Thousands | 6 Months Ended
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Jun. 30, 2021 USD ($)
Contractual obligations |  |
Remainder of 2021 | $ 9,873 | [1],[2]
2022 | 11,801 | [1],[2]
2023 | 173,692 | [1],[2]
2024 | 0 | [1],[2]
2025 | 0 | [1],[2]
Total contractual obligation | 195,366 | [1],[2]
Unrecognized tax benefit excluding foreign tax withholdings | 27,200 |
Software licenses |  |
Contractual obligations |  |
Remainder of 2021 | 5,317 | [1],[2],[3]
2022 | 6,429 | [1],[2],[3]
2023 | 0 | [1],[2],[3]
2024 | 0 | [1],[2],[3]
2025 | 0 | [1],[2],[3]
Total contractual obligation | $ 11,746 | [1],[2],[3]
Terms of noncancellable license agreements, minimum (in years) | 1 year |
Acquisition retention bonuses |  |
Contractual obligations |  |
Remainder of 2021 | $ 3,370 | [1],[2],[4]
2022 | 3,000 | [1],[2],[4]
2023 | 0 | [1],[2],[4]
2024 | 0 | [1],[2],[4]
2025 | 0 | [1],[2],[4]
Total contractual obligation | 6,370 | [1],[2],[4]
Convertible notes |  |
Contractual obligations |  |
Remainder of 2021 | 0 | [1],[2]
2022 | 0 | [1],[2]
2023 | 172,500 | [1],[2]
2024 | 0 | [1],[2]
2025 | 0 | [1],[2]
Total contractual obligation | 172,500 | [1],[2]
Interest payments related to convertible notes |  |
Contractual obligations |  |
Remainder of 2021 | 1,186 | [1],[2]
2022 | 2,372 | [1],[2]
2023 | 1,192 | [1],[2]
2024 | 0 | [1],[2]
2025 | 0 | [1],[2]
Total contractual obligation | $ 4,750 | [1],[2]
[1] | For the Company’s lease commitments as of June 30, 2021, refer to Note 9, “Leases.”
[2] | The above table does not reflect possible payments in connection with unrecognized tax benefits of approximately $27.2 million including $24.0 million recorded as a reduction of long-term deferred tax assets and $3.2 million in long-term income taxes payable as of June 30, 2021. As noted below in Note 14, “Income Taxes,” although it is possible that some of the unrecognized tax benefits could be settled within the next 12 months, the Company cannot reasonably estimate the outcome at this time.
[3] | The Company has commitments with various software vendors for agreements generally having terms longer than one year.
[4] | In connection with the acquisition of Northwest Logic in the third quarter of 2019 and the Secure Silicon IP and Protocols business in the fourth quarter of 2019, the Company is obligated to pay retention bonuses to certain employees subject to certain eligibility and acceleration provisions including the condition of employment.

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