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Commitments and Contingencies - Additional Information (Detail) $ in Millions | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 31, 2019 ft² | Jun. 30, 2019 l | Dec. 31, 2018 USD ($)
Maximum [Member] |  |  |
Commitments and Contingencies [Line Items] |  |  |
Bioreactors used in perfusion cell culture applications | l |  | 2,000 |
Minimum [Member] |  |  |
Commitments and Contingencies [Line Items] |  |  |
Bioreactors used in perfusion cell culture applications | l |  | 50 |
NGL Impact A [Member] | Research and Development Arrangement [Member] |  |  |
Commitments and Contingencies [Line Items] |  |  |
Payments to Navigo in connection with this program, which are recorded to research and development expenses | $ |  |  | $ 2.4
Before Amendment |  |  |
Commitments and Contingencies [Line Items] |  |  |
Lease agreement, space | ft² | 76,000 |  |
After Amendment |  |  |
Commitments and Contingencies [Line Items] |  |  |
Lease agreement, space | ft² | 108,000 |  |
Fifth Amendment [Member] |  |  |
Commitments and Contingencies [Line Items] |  |  |
Rate Per Square Feet | 29.00 |  |
Increase In Lease Agreement Area | 32,000 |  |
Increase Per Square Feet | 1.00 |  |

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- Definition It's represents about capacity of bioreactors. + References No definition available. + Details
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Balance Type: | na
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- Definition Commitments and Contingencies [Line Items] + References No definition available. + Details
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- Definition Increase in rental rate per square feet. + References No definition available. + Details
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- Definition Rental rate per square feet. + References No definition available. + Details
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- Definition Increase in lease agreement area. + References No definition available. + Details
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- Definition Lease agreement area. + References No definition available. + Details
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Balance Type: | na
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- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Details
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Period Type: |

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- Details
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Period Type: |

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- Details
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- Details
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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |