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OPERATING LEASE RIGHT-OF-USE ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Leases |  |  |
Operating lease ROU assets, Beginning | $ 32,781 |  |
Adjustment to ROU asset for remeasurement of Somerville Sublease liability | 4,245 |  |
Amortization of operating lease ROU assets | (1,036) | $ (83) |
Operating lease ROU assets, Ending | 35,990 |  |
Operating lease liabilities, Beginning | 35,070 |  |
Adjustment to lease liablity due to remeasurement of Somerville Sublease | 4,245 |  |
Accretion of interest for Somerville Sublease | 1,787 |  |
Principal payments on operating lease liabilities | (792) |  |
Operating lease liabilities, Ending | 40,310 |  |
Less non-current portion | 36,044 |  | $ 32,854
Current portion | $ 4,266 |  | $ 2,216

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
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