Property, Plant and Equipment - Additional Information (Detail) $ in Millions |
1 Months Ended | 3 Months Ended | 6 Months Ended |
|---|---|---|---|
|
May 31, 2018
USD ($)
|
Jun. 30, 2018
USD ($)
|
Jun. 30, 2018
license
|
|
| Property, Plant and Equipment [Line Items] | |||
| Cash consideration from transfer of permit | $ 0.2 | ||
| Decrease in liabilities from transfer of permit | $ 1.3 | ||
| Loss on transfer of permit | $ 1.0 | ||
| United Kingdom | |||
| Property, Plant and Equipment [Line Items] | |||
| Number of non-operating interest in licenses | license | 2 |
| X | ||||||||||
- Definition Decrease in Liabilities from Transfer of Permit No definition available.
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| X | ||||||||||
- Definition Gain (Loss) on Transfer of Permit No definition available.
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| X | ||||||||||
- Definition Number of non-operating interest in licenses held by entity. No definition available.
|
| X | ||||||||||
- Definition Proceeds from Transfer of Permit No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Details
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