Quarterly report pursuant to Section 13 or 15(d)

National Holdings Corporation - Additional Information (Detail)

v3.5.0.2
National Holdings Corporation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
1 Months Ended 9 Months Ended
Sep. 30, 2016
Apr. 27, 2016
Sep. 30, 2016
Sep. 09, 2016
Dec. 31, 2015
Business Acquisition [Line Items]          
Common Stock Par Or Stated Value Per Share $ 0.001   $ 0.001   $ 0.001
Business Combination, Consideration Transferred     $ 22,872    
Goodwill $ 21,739   $ 21,739   $ 0
National Holdings Corporation [Member]          
Business Acquisition [Line Items]          
Common Stock Par Or Stated Value Per Share   $ 0.02   $ 0.02  
Business Acquisition, Share Price   $ 3.25   $ 3.25  
Number Of Shares Tendered   7      
Business Acquisition, Percentage of Voting Interests Acquired 56.10% 56.00% 56.10%    
Business Combination, Consideration Transferred $ 22,900 $ 22,900