XML 67 R34.htm IDEA: XBRL DOCUMENT v3.20.1
Note 6 - Accounts Receivable (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   
December 31,
 
   
2019
   
2018
 
Commercial
  $
7,494
    $
9,962
 
Allowance for doubtful accounts
   
(50
)    
(81
)
Net
  $
7,444
    $
9,881