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Intangible Assets, Net - Schedule of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2013
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Dec. 31, 2012
|
Dec. 31, 2011
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|---|---|---|---|
| Intangible Assets [Line Items] | |||
| Gross Carrying Amount | $ 49,242 | $ 34,988 | $ 34,988 |
| Accumulated Amortization | (6,979) | (5,482) | (2,455) |
| Net | 42,263 | 29,506 | 32,533 |
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Patents and Related Technologies [Member]
|
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| Intangible Assets [Line Items] | |||
| Gross Carrying Amount | 34,342 | 34,342 | 34,342 |
| Accumulated Amortization | (6,979) | (4,851) | (2,014) |
| Net | 27,363 | 29,491 | 32,328 |
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In- Process Research and Development [Member]
|
|||
| Intangible Assets [Line Items] | |||
| Gross Carrying Amount | 14,900 | ||
| Accumulated Amortization | |||
| Net | 14,900 | ||
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Favorable Rent Asset [Member]
|
|||
| Intangible Assets [Line Items] | |||
| Gross Carrying Amount | 646 | 646 | |
| Accumulated Amortization | (631) | (441) | |
| Net | $ 15 | $ 205 |