Quarterly report pursuant to Section 13 or 15(d)

National Holdings Corporation Acquisition - Intangible Assets - future amortization of these intangible assets (Detail)

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National Holdings Corporation Acquisition - Intangible Assets - future amortization of these intangible assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Total $ 14,400 $ 15,223
National Holdings Corporation [Member]    
Nine Months Ended December 31, 2018 2,110  
Year Ended December 31, 2019 2,800  
Year Ended December 31, 2020 2,807  
Year Ended December 31, 2021 2,800  
Year Ended December 31, 2022 2,026  
Thereafter 1,107  
Total 13,650  
Customer Lists [Member]    
Nine Months Ended December 31, 2018 1,884  
Year Ended December 31, 2019 2,500  
Year Ended December 31, 2020 2,506  
Year Ended December 31, 2021 2,500  
Year Ended December 31, 2022 1,726  
Thereafter 0  
Total 11,116  
Trademarks [Member]    
Nine Months Ended December 31, 2018 226  
Year Ended December 31, 2019 300  
Year Ended December 31, 2020 301  
Year Ended December 31, 2021 300  
Year Ended December 31, 2022 300  
Thereafter 1,107  
Total $ 2,534