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v3.21.2

RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Millions | 15 Months Ended | 21 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021
Shared Services Agreement [Member] |  |
Related Party Transaction [Line Items] |  |
Expenses incurred | $ 0.2 | $ 0.6

X
- Definition The amount of expenses incurred for first milestone achievement. + References No definition available. + Details
Name: | tgtx_ExpensesIncurredForFirstMilestoneAchievement
Namespace Prefix: | tgtx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=tgtx_SharedServicesAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |