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RELATED PARTY (Details) - USD ($)
$ in Thousands
Oct. 01, 2021
Mar. 31, 2022
Jan. 31, 2022
Dec. 31, 2021
Related Party        
Amount of potential DoE funding $ 21,900      
Percentage of total estimated cost for the project covered by DoE funding 0.50%      
Allowable costs for planned demonstration funded on cost share basis $ 43,900      
Percentage of total cost of the demonstration plant funded by DoE 50.00%      
Percentage of total cost of the demonstration plant funded by non federal entity 50.00%      
Restricted cash       $ 2,700
General Atomics        
Related Party        
Allowable costs for planned demonstration funded on cost share basis     $ 2,700  
Commitment Amount   $ 2,700 $ 2,700