Quarterly report pursuant to Section 13 or 15(d)

INDEBTEDNESS - Schedule of debt (Details)

v3.22.1
INDEBTEDNESS - Schedule of debt (Details) - USD ($)
Mar. 31, 2022
Mar. 31, 2021
Schedule of Capitalization, Long-term Debt [Line Items]    
Debt, Current $ 68,000  
Debt, Non current 229,000  
Restricted cash included in other long-term assets 103,000 $ 0
NEBT Loans    
Schedule of Capitalization, Long-term Debt [Line Items]    
Debt, Current 15,000  
Debt, Non current 40,000  
RETOS 2015    
Schedule of Capitalization, Long-term Debt [Line Items]    
Debt, Current 53,000  
Debt, Non current $ 189,000