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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions | May 31, 2018 | Sep. 28, 2018
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First Amendment to Amended and Restated Lease |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Lease agreement term | 12 years |
Lease expiration date | May 31, 2031 |
Lease annual rental payment | $ 1.8 |
Increase in annual lease rental payments rate | 2.50% |
Future minimum lease payments |  | $ 26.4
Existing Lease Agreement |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Lease expiration date | May 31, 2019 |

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