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NOTE 4 - OTHER ACCRUED LIABILITIES (Tables)
 3 Months Ended
Mar. 31, 2021
Accrued Liabilities [Abstract]  
Other accrued liabilities
   March 31,
2021		  December 31,
2020
 (in thousands)          
 Lease liability - short term  $612   $673 
 Product warranty   367    371 
 Sales return reserve   61    61 
 Other taxes   110    109 
 Other   161    93 
 Other accrued liabilities  $1,311   $1,307 
Product warranty liability
   March 31,
2021
 (in thousands)     
 Liability, beginning balance  $371 
 Net expenses   184 
 Warranty claims   (184)
 Accrual revisions   (4)
 Liability, ending balance  $367