Annual report pursuant to section 13 and 15(d)

Rent Expense for Operating Leases (Detail)

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Rent Expense for Operating Leases (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule of Rent Expense [Line Items]      
Rent expense $ 577 $ 301 $ 480
Less sublease rentals (47) (35) (142)
Total rent expense $ 530 $ 266 $ 338