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 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Interest Expense [Line Items]        
Interest expense $ 380 $ 380 $ 1,155 $ 1,349
Notes Payable to Former Stockholders [Member]        
Interest Expense [Line Items]        
Interest expense $ 122 $ 133 $ 381 $ 414