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Commitments and Contingencies (Details) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Jul. 31, 2017 | Jun. 30, 2017
Operating Leases |  |  |  |
For the remainder of the fiscal year | $ 471 |  |  |
2019 | 2,752 |  |  |
2020 | 2,404 |  |  |
2021 | 1,980 |  |  |
2022 | 1,406 |  |  |
Net rent expense | $ 1,900 | $ 1,100 |  |
Monrovia |  |  |  |
Lease term |  |  | 64 months |
Renewal term |  |  | 5 years |
San Diego |  |  |  |
Lease term |  |  |  | 61 months
Renewal term |  |  |  | 5 years

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