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LICENSE AGREEMENTS (Details)
 1 Months Ended 3 Months Ended 9 Months Ended 15 Months Ended
Jul. 31, 2020
USD ($)
Jul. 31, 2019
USD ($)
Apr. 30, 2018
USD ($)
May 31, 2016
USD ($)
Dec. 31, 2012
USD ($)
Sep. 30, 2021
USD ($)
item
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
item
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
item
Dec. 31, 2020
USD ($)
Nov. 30, 2012
USD ($)
Revenue           $ 2,030,000 $ 38,000 $ 4,368,000 $ 114,000      
Eligible payments to be received           47,433,000 45,846,000 140,872,000 114,785,000      
TG-1101 [Member]                        
Upfront fee       $ 5,000,000.0 $ 2,000,000.0              
Income taxes         $ 300,000              
Revenue           38,000 38,000 114,000 114,000      
Term after first commercial sale         15 years              
Deferred Revenue           600,000   600,000   $ 600,000 $ 800,000  
Deferred Revenue, Current           200,000   200,000   200,000    
TG-1701 [Member]                        
Upfront fee   $ 100,000 $ 1,000,000.0         350,000,000        
Milestone payment made $ 2,000,000.0                      
Expenses incurred           4,200,000 $ 300,000 9,000,000.0 600,000      
TG-1801 [Member]                        
Upfront fee               3,000,000.0        
Additional payments on achievement of certain milestones                       $ 185,000,000
Expenses incurred               2,000,000.0        
TGR-1202 [Member]                        
Additional payments on achievement of certain milestones           $ 175,000,000   175,000,000   $ 175,000,000    
Milestone payment made               $ 12,000,000.0        
Number of oncology indications | item           2   2   2    
Number of non oncology indications | item           1   1   1    
Royalty Expense           $ 100,000   $ 300,000        
Expenses incurred           $ 100,000            
TG 1501 [Member]                        
Expenses incurred               0 $ 900,000 $ 0    
LFB Group [Member] | LFB License Agreement                        
Eligible payments to be received               $ 31,000,000.0        
Operating lease initial commitment period               15 years        
Expenses incurred               $ 10,000,000.0