THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recurring Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Jul. 23, 2021
Non-current Assets
Total non-current assets recorded at fair value	$ 0	$ 0
Non-current Liabilities
Total non-current liabilities recorded at fair value	0	0
Recurring
Assets, Current [Abstract]
Total current assets recorded at fair value	10,424	68,676
Recurring | Money market account
Assets, Current [Abstract]
Total current assets recorded at fair value	10,424	68,676
Recurring | Level 1
Assets, Current [Abstract]
Total current assets recorded at fair value	10,424	68,676
Recurring | Level 1 | Money market account
Assets, Current [Abstract]
Total current assets recorded at fair value	10,424	$ 68,676
Alabama Graphite
Non-current Assets
Land grant	$ 1,400		$ 1,400