Note 10 - License Agreements (Details Textual) - USD ($) $ in Thousands		1 Months Ended		12 Months Ended
	Jul. 28, 2023	Jul. 31, 2020	Dec. 31, 2012	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2018	Jan. 31, 2018	Sep. 22, 2014	Jan. 31, 2012
Income Tax Expense (Benefit)				$ 390	$ 0	$ 0
Deferred Revenue				300
L F B License Agreement [Member]
License And Collaboration Agreement, Expenses Incurred				31,000
Accounts Payable				0
Royalty Expense				8,700
Accrued Royalties				3,900
L F B License Agreement [Member] | License Agreement Terms [Member]
Finite-Lived Intangible Asset, Useful Life (Year)										15 years
L F B License Agreement [Member] | Maximum [Member]
Additional Amount Receivable on Achievement of Pre-specified Milestones										$ 6,000
Sublicense Agreement With Ildong Pharmaceutical Co [Member]
Additional Amount Receivable on Achievement of Pre-specified Milestones			$ 5,000
Upfront Fee Received From Sub License			2,000
Income Tax Expense (Benefit)			$ 300
License Revenue				200	200	200
Deferred Revenue					500
Sublicense Agreement With Ildong Pharmaceutical Co [Member] | License Agreement Terms [Member]
Finite-Lived Intangible Asset, Useful Life (Year)			15 years
Commercialization Agreement With Neuraxpharm [Member]
Additional Amount Receivable on Achievement of Pre-specified Milestones	$ 492,500
License and Collaboration Agreements, One-time, Non-refundable Payment	140,000			140,000
Additional Payments Upon Key Market Commercial Launch	$ 12,500
Royalty Percentage on Net Product Sales	30.00%
Agreement Buyback Period (Year)	2 years
TG 1701 [Member]
Additional Amount Payable on Achievement of Pre-specified Milestones								$ 350,000
TG 1701 [Member] | Hengrui [Member]
Milestone Payments		$ 2,000
TG 1801 [Member]
Additional Amount Payable on Achievement of Pre-specified Milestones							$ 185,000
The Umbralisib License [Member]
License And Collaboration Agreement, Expenses Incurred				24,000
Royalty Expense				0
Additional Amount Payable on Achievement of Pre-specified Milestones									$ 175,000
The Umbralisib License [Member] | Rhizen [Member]
Milestone Payments						12,000
TG 1501 [Member]
License And Collaboration Agreement, Expenses Incurred				$ 100	$ 100	$ 100