Related Party Note - Additional Information (Detail) - USD ($) |
1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|---|
Dec. 17, 2015 |
Mar. 17, 2015 |
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
Dec. 31, 2014 |
|
| Related Party Transaction [Line Items] | |||||||
| Costs and Expenses, Related Party | $ 66,000 | $ 40,000 | $ 153,700 | $ 79,000 | |||
| Agreement Description Terms | issue annually to the Company, on the anniversary date of the Founders Agreement, shares of Checkpoint common stock equal to 2.25% of the fully-diluted outstanding equity of Checkpoint at the time of issuance; (ii) pay an equity fee in shares of Checkpoint common stock, payable within five (5) business days of the closing of any equity or debt financing for Checkpoint 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 Checkpoints voting equity, equal to 2.25% of the gross amount of any such equity or debt financing; and (iii) pay a cash fee equal to 4.5% of its annual net sales, payable on an annual basis, within 90 days of the end of each calendar year. In the event of a change in control (as defined in the Founders Agreement), the Company will pay a one-time change in control fee equal to five times (5x) the product of (i) monthly net sales for the 12 months immediately preceding the change in control and (ii) 4.5% | ||||||
| Payment of Fund | $ 0 | ||||||
| Working Capital | 500,000 | 500,000 | |||||
| Cb Pharma Acquisition Corp [Member] | |||||||
| Related Party Transaction [Line Items] | |||||||
| Working Capital | 500,000 | 500,000 | $ 100,000 | ||||
| TG Therapeutics, Inc [Member] | |||||||
| Related Party Transaction [Line Items] | |||||||
| Increase (Decrease) in Accounts Receivable | $ 0 | 71,800 | $ 0 | ||||
| Accounts Receivable, Net, Total | $ 69,300 | 69,300 | |||||
| Collaboration Agreement with TGTX [Member] | |||||||
| Related Party Transaction [Line Items] | |||||||
| Underwriting Commission Incurred | $ 25,000 | ||||||
| Payments for Fees | 500,000 | ||||||
| Collaboration Agreement with TGTX [Member] | TG Therapeutics, Inc [Member] | |||||||
| Related Party Transaction [Line Items] | |||||||
| Payments for Fees | 500,000 | ||||||
| Management Services Agreement [Member] | |||||||
| Related Party Transaction [Line Items] | |||||||
| Debt Issuance Cost | $ 2,800,000 | ||||||
| Agreement Service Period | 5 years | ||||||