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Principal and Interest Payments on Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Debt Instrument [Line Items]  
2013 (remaining nine months) $ 1,541 [1]
2014 4,722 [1],[2]
2015 $ 1,334 [1]
[1] In April 2013, the Company repaid the Growth Capital Loan and all associated accrued interest, as well as a scheduled final payment fee of $0.05 million. These amounts in aggregate were $4.2 million.
[2] Included outstanding revolving line of credit balance based on the Company's obligation to repay the outstanding revolving line of credit balance at the end of the revolving line of credit term.