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Long-Term Obligations and Commitments, Operating Leases (Details) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) Option | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Operating Leases [Abstract] |  |  |  |  |
Lease payments to be made over initial term of lease |  |  | $ 27,487 |  |
Right-of-use operating lease assets | [1] |  | $ 18,000 |  |
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] |  |  | Other Assets, Noncurrent |  |
Operating lease liabilities | [2] |  | $ 22,058 |  |
Weighted average remaining lease term |  |  | 6 years 7 months 6 days |  |
Weighted average discount rate |  |  | 6.00% |  |
Current portion of operating lease liabilities |  |  | $ 2,600 |  |
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] |  |  | Long-term Obligations, Excluding Convertible Debt, Current |  |
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] |  |  | Long-term Obligations Excluding Convertible Debt, Noncurrent |  |
Operating lease cash payments |  |  | $ 3,300 | $ 3,800 | $ 3,900
Carlsbad Facility [Member] |  |  |  |  |
Operating Leases [Abstract] |  |  |  |  |
Number of options to extend lease | Option |  |  | 1 |  |
Term of lease extension |  |  | 5 years |  |
Carlsbad Office Spaces [Member] |  |  |  |  |
Operating Leases [Abstract] |  |  |  |  |
Number of options to extend lease | Option |  |  | 1 |  |
Term of lease extension |  |  | 5 years |  |
Boston Office Space [Member] |  |  |  |  |
Operating Leases [Abstract] |  |  |  |  |
Term of lease extension |  |  | 5 years |  |
Initial term of operating lease |  |  | 123 months |  |
Period of free rent under lease |  |  | 3 months |  |
Tenant improvement allowance |  |  | $ 3,800 |  |
Subleased Office Space in Boston [Member] | Subsequent Event [Member] |  |  |  |  |
Operating Leases [Abstract] |  |  |  |  |
Term of sublease |  | 83 months |  |  |
Period of free rent under sublease |  | 7 months |  |  |
Lease payments to be received under sublease |  | $ 9,600 |  |  |
Another Office Space in Boston [Member] |  |  |  |  |
Operating Leases [Abstract] |  |  |  |  |
Number of options to extend lease | Option |  |  | 1 |  |
Term of lease extension |  |  | 5 years |  |
Initial term of operating lease |  |  | 91 months |  |
Period of free rent under lease |  |  | 7 months |  |
Lease payments to be made over initial term of lease |  |  | $ 6,800 |  |
[1] | Included in deposits and other assets on our consolidated balance sheet.
[2] | Current portion of $2.6 million was included in current portion of long-term obligations on our consolidated balance sheet, with the difference included in long-term obligations.

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