Quarterly report pursuant to Section 13 or 15(d)

National Holdings Corporation Acquisition - Intangible Assets - gross carrying amounts related to acquired intangible assets (Detail)

v3.10.0.1
National Holdings Corporation Acquisition - Intangible Assets - gross carrying amounts related to acquired intangible assets (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Amortization expense $ (2,100) $ (1,235)
National Holdings Corporation [Member]    
Intangible assets at December 31, 2017 14,340  
Addition 45  
Amortization expense (2,100)  
Intangible assets at September 30, 2018 $ 12,285