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Net Income (Loss) per Common Share - Additional Information (Detail) | Dec. 31, 2015 shares
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Earnings Per Share [Abstract] |
Common shares loaned under the share lending arrangement, issued and outstanding | 1,800,000

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- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of shares outstanding as of the date of the statement of financial position in connection with an own-share lending arrangement entered into by the entity, in contemplation of a convertible debt offering or other financing. + References No definition available. + Details
Name: | us-gaap_OwnshareLendingArrangementSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant