Quarterly report pursuant to Section 13 or 15(d)

Notes Payable to Former Stockholders - Schedule of Interest Expense Pertaining to Notes (Detail)

v3.5.0.2
Notes Payable to Former Stockholders - Schedule of Interest Expense Pertaining to Notes (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Interest Expense [Line Items]        
Interest expense $ 384 $ 386 $ 775 $ 969
Notes Payable to Former Stockholders [Member]        
Interest Expense [Line Items]        
Interest expense $ 126 $ 137 $ 259 $ 281