Note 5 - Fair Value Measurements - Schedule of Change in Level Three Fair Value (Details) - Fair Value, Inputs, Level 3 [Member] $ in Thousands	9 Months Ended
Sep. 30, 2023 USD ($)
Balance	$ 243
Interest accrued on face value of 5% Notes	844
Change in fair value of Level 3 liabilities	(915)
Balance	$ 172

Amount of interest recognized during the period, arising from liabilities measured at fair value on a recurring basis using unobservable inputs (level 3).

No definition available.

+ Details

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Namespace Prefix:	tgtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-SubTopic 10
-Topic 820
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

+ Details

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- Details

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