Related Party Transactions - Additional Information (Detail) - USD ($) |
1 Months Ended | 3 Months Ended | 12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jul. 18, 2019 |
Nov. 30, 2017 |
Oct. 03, 2014 |
Nov. 30, 2017 |
Jul. 31, 2017 |
Jun. 30, 2017 |
Jun. 26, 2017 |
May 31, 2016 |
Oct. 31, 2015 |
Sep. 30, 2014 |
Jun. 30, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Mar. 29, 2019 |
Nov. 12, 2018 |
|
| Related Party Transaction [Line Items] | ||||||||||||||||
| Payments for Other Fees | $ 100,000 | $ 2,100,000 | ||||||||||||||
| Operating Leases, Rent Expense | $ 2,500,000 | $ 55,000 | $ 200,000 | $ 2,100,000 | $ 1,700,000 | |||||||||||
| Business Acquisition, Percentage of Voting Interests Acquired | 33.30% | |||||||||||||||
| Payments of Loan Costs | 118,000 | 404,000 | ||||||||||||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 3.47 | |||||||||||||||
| Proceeds from Convertible Debt | 15,000,000 | 0 | ||||||||||||||
| Proceeds from Other Debt | $ 0 | 21,707,000 | ||||||||||||||
| Noninterest Expense Transfer Agent and Custodian Fees | 1,700,000 | |||||||||||||||
| Description Of Fee Paid | NSC received a fee of approximately $1.8 million, or 8% on the gross proceeds raised of $23.0 million | |||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 2.50% | |||||||||||||||
| Line Of Credit Facility, Prepayment Amount | $ 500,000 | |||||||||||||||
| Common Shares Issued For Opus Debt, In Shares | 396,825 | |||||||||||||||
| Common Shares Issued For Opus Debt, Issue Price | $ 1.26 | |||||||||||||||
| Desk Share Agreements [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Payments for Rent | $ 2,800,000 | |||||||||||||||
| Waltham [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Payments for Rent | 240,000 | 223,000 | ||||||||||||||
| New York Office [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Payments for Rent | $ 2,600,000 | $ 2,700,000 | ||||||||||||||
| National Holdings Corporation [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Business Acquisition, Percentage of Voting Interests Acquired | 32.10% | |||||||||||||||
| NSC Note [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Payments for Rent | $ 2,800,000 | |||||||||||||||
| Percentage Of Placement Agent Fee | 10.00% | |||||||||||||||
| Warrant on Sale Price of Note Percentage | 10.00% | |||||||||||||||
| Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 716,180 | |||||||||||||||
| NSC Note [Member] | Maximum | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 4.75 | |||||||||||||||
| NSC Note [Member] | Minimum | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 3.61 | |||||||||||||||
| Opus Credit Facility [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Payments of Loan Costs | $ 500,000 | |||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 12.00% | |||||||||||||||
| Line Of Credit Facility, Prepayment Amount | $ 500,000 | |||||||||||||||
| Common Shares Issued For Opus Debt, In Shares | 396,825 | |||||||||||||||
| Common Shares Issued For Opus Debt, Issue Price | $ 1.26 | |||||||||||||||
| Caelum Convertible Notes [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Debt Instrument, Face Amount | $ 10,000,000 | |||||||||||||||
| Proceeds from Convertible Debt | $ 9,900,000 | |||||||||||||||
| Debt Instrument Issuance Percentage of Commission | 10.00% | |||||||||||||||
| Payments of Financing Costs | $ 1,000,000 | |||||||||||||||
| Class of Warrant or Right Percentage Securities Called by Warrants or Rights | 10.00% | |||||||||||||||
| Class Of Warrant Or Right Exercise Price Percentage Of Warrants Or Rights | 110.00% | |||||||||||||||
| Class of Warrant or Right Exercise Price Description | the exercise price will be $75 million dollars divided by the total number of fully-diluted shares of Common Stock outstanding immediately prior to exercise of the warrant, giving effect to the assumed conversion of all options, warrants, and convertible securities of the Company | |||||||||||||||
| Chief Executive Officer [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Interest own in percent by principal stockholder or director | 13.10% | |||||||||||||||
| Chief Executive Officer And Executive Vice President [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Bonuses Paid To Related Party | $ 500,000 | $ 0 | $ 500,000 | |||||||||||||
| TG Therapeutics, Inc [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Percentage of Rentable Area | 45.00% | 40.00% | ||||||||||||||
| TG Therapeutics, Inc [Member] | Shared Services Agreement [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Proceeds from Related Party Agreement | 500,000 | 1,300,000 | ||||||||||||||
| Due from Related Parties, Current | 500,000 | 1,300,000 | ||||||||||||||
| TG Therapeutics, Inc [Member] | Desk Share Agreements [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Due from Related Parties, Current | 1,400,000 | |||||||||||||||
| TG Therapeutics, Inc [Member] | Waltham [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Due from Related Parties, Current | 109,000 | 47,000 | ||||||||||||||
| TG Therapeutics, Inc [Member] | New York Office [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Payments for Rent | 114,000 | |||||||||||||||
| Due from Related Parties, Current | $ 1,300,000 | 1,000,000 | ||||||||||||||
| TG Therapeutics, Inc [Member] | Opus Credit Facility [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Payments of Loan Costs | 300,000 | |||||||||||||||
| Founders Agreement [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Agreement Description Term | The Company has entered into Founders Agreements with each of the Fortress subsidiaries listed in the table below. Pursuant to each Founders Agreement, in exchange for the time and capital expended in the formation of each partner company and the identification of specific assets the acquisition of which result in the formation of a viable emerging growth life science company, the Company will loan each such partner company an amount representing the up-front fee required to acquire assets. Each Founders Agreement has a term of 15 years, which upon expiration automatically renews for successive one-year periods unless terminated by the Company or a Change in Control (as defined in the Founders Agreement) occurs. In connection with each Founders Agreement the Company receives 250,000 Class A Preferred shares (except for that with Checkpoint, in which the Company holds Class A Common Stock). The Class A Preferred Stock (Class A Common Stock with respect to Checkpoint) is identical to common stock other than as to voting rights, conversion rights and the PIK Dividend right (as described below). Each share of Class A Preferred Stock (Class A Common Stock with respect to Checkpoint) is entitled to vote the number of votes that is equal to one and one-tenth (1.1) times a fraction, the numerator of which is the sum of (A) the shares of outstanding common stock and (B) the whole shares of common stock into which the shares of outstanding Class A Preferred Stock (Class A Common Stock with respect to Checkpoint) are convertible and the denominator of which is the number of shares of outstanding Class A Preferred Stock (Class A Common Stock with respect to Checkpoint). Thus, the Class A Preferred Stock (Class A Common Stock with respect to Checkpoint) will at all times constitute a voting majority. Each share of Class A Preferred Stock (Class A Common Stock with respect to Checkpoint) is convertible, at the holder's option, into one fully paid and nonassessable share of common stock of such partner company, subject to certain adjustments. The holders of Class A Preferred Stock (and the Class A Common Stock with respect to Checkpoint), as a class, are entitled receive on each effective date or "Trigger Date" (defined as the date that the Company first acquired, whether by license or otherwise, ownership rights to a product) of each agreement (each a "PIK Dividend Payment Date") until the date all outstanding Class A Preferred Stock (Class A Common Stock with respect to Checkpoint) is converted into common stock or redeemed (and the purchase price is paid in full), pro rata per share dividends paid in additional fully paid and nonassessable shares of common stock ("PIK Dividends") such that the aggregate number of shares of common stock issued pursuant to such PIK Dividend is equal to two and one-half percent (2.5%) of such partner company's fully-diluted outstanding capitalization on the date that is one (1) business day prior to any PIK Dividend Payment Date. The Company has reached agreements with several of the partner companies to change the PIK Dividend Interest Payment Date to January 1 of each year - a change that has not and will not result in the issuance of any additional partner company common stock beyond that amount to which the Company would otherwise be entitled absent such change(s). The Company owns 100% of the Class A Preferred Stock (Class A Common Stock with respect to Checkpoint) of each partner company that has a Founders Agreement with the Company.As additional consideration under the Founders Agreement, each partner company with which the Company has entered into a Founders Agreement will also: (i) pay an equity fee in shares of the common stock of such partner company, payable within five (5) business days of the closing of any equity or debt financing for each partner company or any of its respective subsidiaries that occurs after the effective date of the Founders Agreement and ending on the date when the Company no longer has majority voting control in such partner company's voting equity, equal to two and one-half (2.5%) of the gross amount of any such equity or debt financing; and (ii) pay a cash fee equal to four and one-half percent (4.5%) of such partner company's annual net sales, payable on an annual basis, within ninety (90) days of the end of each calendar year. In the event of a Change in Control, each such partner company will pay a one-time change in control fee equal to five (5x) times the product of (A) net sales for the twelve (12) months immediately preceding the change in control and (B) four and one-half percent (4.5%). | |||||||||||||||
| OPPM [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Percentage of Rentable Area | 10.00% | 20.00% | ||||||||||||||
| Due from Related Parties, Current | $ 180,000 | $ 217,000 | ||||||||||||||
| OPPM [Member] | Desk Share Agreements [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Due from Related Parties, Current | 180,000 | |||||||||||||||
| OPPM [Member] | New York Office [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Payments for Rent | $ 400,000 | |||||||||||||||
| Executives Vice Chairman [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Interest own in percent by principal stockholder or director | 12.70% | 15.20% | ||||||||||||||
| Executives Vice Chairman [Member] | Chief Executive Officer [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Interest own in percent by principal stockholder or director | 11.60% | |||||||||||||||
| Avenue [Member] | ||||||||||||||||
| Related Party Transaction [Line Items] | ||||||||||||||||
| Payments For Underwriter Fees | $ 2,300,000 | |||||||||||||||