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Note 14 - Subsequent Event (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 9 Months Ended
Nov. 08, 2019
Sep. 30, 2019
Sep. 30, 2018
Repayments of Long-term Debt, Total   $ 2,143 $ 2,143
Subsequent Event [Member] | Subsidiary Guarantors [Member] | Amended and Restated Credit Agreement [Member] | Unsecured Term Loan [Member]      
Repayments of Long-term Debt, Total $ 8,000