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PROPERTY AND EQUIPMENT, NET (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Property, Plant and Equipment [Line Items]          
Total property and equipment $ 28,139   $ 28,139   $ 26,604
Less: Accumulated depreciation (24,725)   (24,725)   (24,053)
Total property and equipment, net 3,414   3,414   2,551
Depreciation expense 200 $ 200 700 $ 700  
Quantum computer systems          
Property, Plant and Equipment [Line Items]          
Total property and equipment 13,965   13,965   13,712
Lab equipment          
Property, Plant and Equipment [Line Items]          
Total property and equipment 6,865   6,865   6,839
Computer equipment          
Property, Plant and Equipment [Line Items]          
Total property and equipment 4,361   4,361   3,703
Leasehold improvements          
Property, Plant and Equipment [Line Items]          
Total property and equipment 1,890   1,890   1,075
Furniture and fixtures          
Property, Plant and Equipment [Line Items]          
Total property and equipment 381   381   381
Construction-in-progress          
Property, Plant and Equipment [Line Items]          
Total property and equipment $ 677   $ 677   $ 894