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GEOGRAPHIC INFORMATION - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues $ 4,141,000 $ 6,108,000
Long-lived Assets 3,029,000 2,970,000
UNITED STATES    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 3,867,000 5,753,000
Long-lived Assets 2,318,000 2,224,000
KOREA, REPUBLIC OF    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 194,000 256,000
Long-lived Assets 0 0
CHINA    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 58,000 62,000
Long-lived Assets 551,000 592,000
TAIWAN    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 7,000 10,000
Long-lived Assets 160,000 154,000
Other Foreign Countries [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 15,000 27,000
Long-lived Assets $ 0 $ 0