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Accrued Expenses - Schedule of Accrued Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Accrued Liabilities Current [Abstract]    
Bonus $ 388 $ 519
Vacation 348 219
Interest 214 62
Severance 204  
Consulting 186 102
Legal and professional fees 159 99
Vendors 176 182
Other 231 223
Total accrued expenses $ 1,906 $ 1,406