Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Additional Information (Detail)

v3.10.0.1
Related Party Transactions - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Aug. 31, 2018
May 31, 2018
Feb. 02, 2018
Dec. 31, 2017
Related Party Transaction [Line Items]                  
Lease Sharing Agreements Contributions To Property Under Lease       $ 96,000          
Description Of Fee Paid       NSC received a fee of approximately $1.8 million, or 8% on the gross proceeds raised of $23.0 million.          
Proceeds from Other Debt       $ 21,707,000 $ 0        
Noninterest Expense Transfer Agent and Custodian Fees       $ 1,700,000          
Common Stock, Shares, Issued 56,183,480     56,183,480   147,741 86,289   50,991,285
National Holdings Corporation [Member]                  
Related Party Transaction [Line Items]                  
Business Acquisition, Percentage of Voting Interests Acquired 56.30%     56.30%          
Opus Credit Facility [Member]                  
Related Party Transaction [Line Items]                  
Payments of Loan Costs       $ 300,000 800,000        
Debt Instrument, Interest Rate, Stated Percentage [1] 12.00%     12.00%          
Chief Executive Officer [Member]                  
Related Party Transaction [Line Items]                  
Interest own in percent by principal stockholder or director 13.20%     13.20%          
Board of Directors Chairman [Member] | National Holdings Corporation [Member]                  
Related Party Transaction [Line Items]                  
Equity Method Investment, Ownership Percentage 4.20%     4.20%          
Chief Executive Officer And Executive Vice President [Member]                  
Related Party Transaction [Line Items]                  
Bonuses Paid To Related Party   $ 500,000              
TG Therapeutics, Inc [Member]                  
Related Party Transaction [Line Items]                  
Payments for Rent       $ 700,000          
Due from Related Parties, Current $ 43,000     $ 43,000          
Founders Agreement [Member] | Avenue Therapeutics, Inc. [Member]                  
Related Party Transaction [Line Items]                  
Other Fee,Percentage       2.50%          
OPPM [Member]                  
Related Party Transaction [Line Items]                  
Payments for Rent       $ 162,000          
Due from Related Parties, Current $ 10,000     $ 10,000          
Executives Vice Chairman [Member]                  
Related Party Transaction [Line Items]                  
Interest own in percent by principal stockholder or director 15.30%     15.30%          
Collaborative Agreements with TGTX [Member]                  
Related Party Transaction [Line Items]                  
Proceeds from Option Fee               $ 50,000  
Desk Share Agreements [Member]                  
Related Party Transaction [Line Items]                  
Payments for Rent       $ 1,800,000          
Desk Share Agreements [Member] | TG Therapeutics, Inc [Member]                  
Related Party Transaction [Line Items]                  
Due from Related Parties, Current $ 48,000     48,000          
Desk Share Agreements [Member] | OPPM [Member]                  
Related Party Transaction [Line Items]                  
Due from Related Parties, Current 162,000     162,000          
Shared Services Agreement [Member] | TG Therapeutics, Inc [Member]                  
Related Party Transaction [Line Items]                  
Proceeds from Related Party Agreement 200,000   $ 200,000 1,200,000 $ 800,000        
Due from Related Parties $ 100,000     $ 100,000          
[1] Classified as short-term on the Company’s Condensed Consolidated Balance Sheet as of September 30, 2018.