THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Inventory and Other Information (Details) $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($) t	Jun. 22, 2021 a
Alabama Graphite
Inventory [Line Items]
Acres of land under lease \| a		70
Natural Flake Graphite Concentrate
Inventory [Line Items]
Raw material (in metric tons) \| t	603
Value of raw material \| $	$ 0.8

Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a)(4))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant