SUPPLEMENTAL FINANCIAL INFORMATION - Summary of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Supplemental Financial Information [Abstract]
Research and development service agreements, current	$ 4,841	$ 1,680
Research and development service agreements, noncurrent	75	169
Research and development service agreements	4,916	1,849
Prepaid insurance	858	807
Other receivables	345
Dues and subscriptions	230	175
Prepaid raw materials, current	159	98
Prepaid raw materials, noncurrent	9	42
Prepaid raw materials	168	140
Interest receivable, current	53	225
Interest receivable, noncurrent	0	0
Interest receivable	53	225
Right-of-use asset	$ 266	$ 381
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets, long-term	Other assets, long-term
Property and equipment, net	$ 73	$ 122
Other, current	263	108
Other, noncurrent	63	10
Other	326	118
Prepaid expenses and other current assets	6,749	3,093
Other assets, long-term	486	724
Total	7,235	3,817
Accumulated depreciation, property and equipment	$ 100	$ 100