Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.4.0.3
Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended
Apr. 27, 2016
Mar. 31, 2016
Dec. 31, 2015
Subsequent Event [Line Items]      
Common Stock Par Or Stated Value Per Share   $ 0.001 $ 0.001
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Reimbursement Of Transaction Expenses $ 0.8    
Subsequent Event [Member] | Parent [Member]      
Subsequent Event [Line Items]      
Merger Agreement Termination Fee $ 4.4    
Subsequent Event [Member] | National Holdings Corporation [Member]      
Subsequent Event [Line Items]      
Merger Agreement, Minimum percentage of Shares in Tender Offer to Completed Merger 80.00%    
Merger Agreement Termination Fee $ 1.8    
Common Stock Par Or Stated Value Per Share $ 0.02    
Business Acquisition, Share Price $ 3.25