Quarterly report pursuant to Section 13 or 15(d)

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

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National Holdings Corporation Acquisition – Intangible Assets - gross carrying amounts related to acquired intangible assets (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Intangible assets at December 31, 2016 $ 15,991  
Amortization expense (819) $ 0
Intangible assets at March 31, 2017 $ 15,172