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v3.3.0.814

Change in Fair Value of Derivative Liabilities (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Derivatives, Fair Value [Line Items] |  |  |  |  |
Beginning Balance |  |  |  | $ 7,519 | $ 17,994
Record derivative liability |  |  |  | 868 |
Record initial fair value of derivative liability on 2014 senior notes |  |  | $ 3,500 |  | 3,500
(Gain) loss on change in fair value of derivative liabilities |  | $ 230 | (4,466) | 366 | (11,870)
Transfer derivative liability to equity |  |  |  | (1,814) |
Ending Balance | $ 6,930 | 6,930 | 9,121 | 6,930 | 9,121
Warrant |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Compensation income for change in fair value of warrants issued to former employees |  |  |  | (9) | (503)
Warrants Issued October 2009 |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Beginning Balance |  |  |  | 119 | 6,894
(Gain) loss on change in fair value of derivative liabilities |  |  |  | (110) | (6,270)
Ending Balance |  |  | 121 |  | 121
Warrants Issued October 2009 | Warrant |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Compensation income for change in fair value of warrants issued to former employees |  |  |  | (9) | (503)
Embedded Derivative Financial Instruments |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Beginning Balance |  |  |  | 7,400 | 11,100
Record initial fair value of derivative liability on 2014 senior notes |  |  | 3,500 |  | 3,500
(Gain) loss on change in fair value of derivative liabilities | 300 |  |  | (470) | (5,600)
Ending Balance | $ 6,930 | $ 6,930 | $ 9,000 | 6,930 | $ 9,000
Preferred Stock Purchase Option |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Record derivative liability |  |  |  | 868 |
(Gain) loss on change in fair value of derivative liabilities |  |  |  | 946 |
Transfer derivative liability to equity |  |  |  | $ (1,814) |

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- Definition Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Convertible Security -URI http://asc.fasb.org/extlink&oid=6509036 + Details
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