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Organization and Basis of Presentation (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Schedule of future aggregate principle payments
2013 (remaining nine months)	$ 0
2014	1,450
2015	2,374
2016	2,176
Total	$ 6,000

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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