Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Additional Information (Detail)

v3.7.0.1
Related Party Transactions - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended
May 31, 2015
Mar. 31, 2017
Mar. 31, 2016
Sep. 09, 2016
Apr. 27, 2016
Mar. 17, 2014
Related Party Transaction [Line Items]            
Lease Sharing Agreements Contributions To Property Under Lease   $ 100,000        
Equity Method Investment, Ownership Percentage   56.60%       35.00%
National Holdings Corporation [Member]            
Related Party Transaction [Line Items]            
Business Acquisition, Percentage of Voting Interests Acquired   56.60%   56.60% 56.60%  
NSC 2017 Note [Member]            
Related Party Transaction [Line Items]            
Proceeds from Fees Received   $ 325,400        
Percentage Of Placement Agent Fee   10.00%        
Warrants on Sale Price of Note,Percentage   10.00%        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   87,946        
Chord Advisors, LLC [Member]            
Related Party Transaction [Line Items]            
Related Party Transaction, Expenses from Transactions with Related Party $ 10,000          
Board of Directors Chairman [Member] | National Holdings Corporation [Member]            
Related Party Transaction [Line Items]            
Equity Method Investment, Ownership Percentage   4.60%        
TG Therapeutics, Inc [Member]            
Related Party Transaction [Line Items]            
Payments for Rent   $ 300,000        
Due from Related Parties, Current   $ 54,000        
Checkpoint [Member]            
Related Party Transaction [Line Items]            
Business Acquisition, Percentage of Voting Interests Acquired   2.50%        
Checkpoint [Member] | Chord Advisors, LLC [Member]            
Related Party Transaction [Line Items]            
Related Party Transaction, Expenses from Transactions with Related Party   $ 28,000        
OPPM [Member]            
Related Party Transaction [Line Items]            
Payments for Rent   57,000        
Due from Related Parties, Current   12,000        
Mustang [Member] | Chord Advisors, LLC [Member]            
Related Party Transaction [Line Items]            
Related Party Transaction, Expenses from Transactions with Related Party 7,500          
Avenue [Member] | Chord Advisors, LLC [Member]            
Related Party Transaction [Line Items]            
Related Party Transaction, Expenses from Transactions with Related Party $ 5,000          
Desk Share Agreements [Member]            
Related Party Transaction [Line Items]            
Payments for Rent   600,000        
Shared Services Agreement [Member] | TG Therapeutics, Inc [Member]            
Related Party Transaction [Line Items]            
Proceeds from Related Party Agreement   $ 200,000 $ 100,000