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Note 2 - Detail of Certain Balance Sheet Accounts: Schedule of Accounts and Other Receivables (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Details    
Accounts Receivable, Gross, Current $ 4,064 $ 3,713
Income Taxes Receivable, Current 0 0
Interest Receivable and Other Assets 13 14
Allowance for Doubtful Accounts Receivable, Current (121) (104)
Accounts and Other Receivables, Net, Current $ 3,956 $ 3,623