Information Pertaining to Term Loan and 2017 Notes (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Balance - December 31, 2013	$ 25,460
Balance - December 31, 2014	21,879	$ 25,460
Change in Estimated Fair Value
Debt Instrument [Line Items]
Balance - December 31, 2013	(648)
Gain from change in fair value of debt	(3,582)	(648)
Balance - December 31, 2014	(4,230)	(648)
2017 Notes
Debt Instrument [Line Items]
Balance - December 31, 2013	26,108
Exchange of Term Loan for 2017 Notes		25,907
Accrued paid in kind interest		201
Balance - December 31, 2014	26,108	26,108
Term Loan And 2017 Notes
Debt Instrument [Line Items]
Balance - December 31, 2013	25,460
Issuance of Term Loan		25,907
Accrued paid in kind interest		201
Gain from change in fair value of debt	(3,582)	(648)
Balance - December 31, 2014	21,878	25,460
Principal Amount of Term Loans
Debt Instrument [Line Items]
Issuance of Term Loan		25,907
Exchange of Term Loan for 2017 Notes		$ (25,907)
Principal Amount of Term Loans \| 2017 Notes
Debt Instrument [Line Items]
Balance - December 31, 2014	$ 21,900

Exchange of term loan for two thousand seventeen notes.

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- 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.

+ References

No definition available.

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Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to those liabilities still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Interest paid other than in cash for example by issuing additional debt securities. As a noncash item, it is added to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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