Annual report pursuant to Section 13 and 15(d)

Note 8 - Accounts and Other Receivables and Concentrations of Credit Risk (Details Textual)

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Note 8 - Accounts and Other Receivables and Concentrations of Credit Risk (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Allowance for Doubtful Accounts Receivable, Current, Ending Balance $ 0 $ 0
Customer Concentration Risk [Member] | Accounts and Other Receivables [Member] | Meilleur [Member]    
Concentration Risk, Percentage 47.00%  
Customer Concentration Risk [Member] | Accounts and Other Receivables [Member] | Cardinal Health 414 [Member]    
Concentration Risk, Percentage   99.00%