XML 56 R9.htm IDEA: XBRL DOCUMENT v3.20.1
3. ACCOUNTS RECEIVABLE
 12 Months Ended
Dec. 31, 2019
Receivables [Abstract]  
ACCOUNTS RECEIVABLE

Trade accounts receivable was composed of the following at December 31 (in thousands):

 

    2019     2018  
Current trade accounts receivable   $ 63     $ 11