Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Impairment - Schedule of Reconciliation of Impairment Charges Recognized in Operating Expenses (Detail)

v3.8.0.1
Impairment - Schedule of Reconciliation of Impairment Charges Recognized in Operating Expenses (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Asset Impairment Charges [Line Items]    
Impairment charges $ 253 $ 3,464
Path Logic [Member] | Customer Relationships [Member]    
Asset Impairment Charges [Line Items]    
Impairment charges   1,562
HDC Assets [Member]    
Asset Impairment Charges [Line Items]    
Impairment charges   $ 1,902