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COLLABORATION AND LICENSING AGREEMENTS - Deferred Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Current |  |
Beginning balance | $ 10,686 |
Ending balance | 10,913 |
Non-Current |  |
Beginning balance | 7,232 |
Ending balance | 8,350 |
2017 KKC Agreement |  |
Current |  |
Beginning balance | 10,686 | $ 7,182
Prepaid product supply | 227 | 732
Product supply delivered | 0 | (1,328)
Ending balance | 10,913 | 6,586
Non-Current |  |
Beginning balance | 7,232 | 8,644
Prepaid product supply | 1,118 | 3,459
Product supply delivered | 0 | 0
Ending balance | $ 8,350 | $ 12,103

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-2 + Details
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