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v3.20.2

Other Long-Term Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2019
Other Liabilities, Noncurrent [Abstract] |
Schedule of Other Long-Term Liabilities | Other long-term liabilities consist of the following as of December 31, 2018 and 2019 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2018 |  | 2019
Contract liabilities, net of current portion | ​ | $ | 23,880 | ​ | $ | 30,925
Deferred payments related to acquisitions | ​ |  | 5,904 | ​ |  | 4,963
Deferred rent and other facility costs | ​ |  | 6,837 | ​ |  | 1,961
Employee separation costs | ​ |  | 6,800 | ​ |  | 1,838
Loss on facilities not in use | ​ |  | 4,332 | ​ |  | —
Lease incentives | ​ |  | 2,300 | ​ |  | —
Other | ​ |  | 1,263 | ​ |  | 1,764
Other long-term liabilities | ​ | $ | 51,316 | ​ | $ | 41,451
​

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