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Note 4 - Debts and Commitments - Future Obligations (Details)
Sep. 30, 2018
USD ($)
Payments due by Fiscal Year 2017 $ 848,000
Payments due by Fiscal Year 2018 331,000
Payments due by Fiscal Year 2019 19,000
Payments due by Fiscal Year 2020
Payments due by Fiscal Year 2021
Payments due by Fiscal Year 2022 and after
Payments due by Fiscal Year Total 1,198,000
Payments due by Fiscal Year 2017 969,000
Payments due by Fiscal Year 2018 477,000
Payments due by Fiscal Year 2019 158,000
Payments due by Fiscal Year 2020 143,000
Payments due by Fiscal Year 2021 158,000
Payments due by Fiscal Year 2022 and after 1,419,000
Payments due by Fiscal Year Total 3,324,000
Real Estate Loan [Member]  
Payments due by Fiscal Year 2017 121,000
Payments due by Fiscal Year 2018 126,000
Payments due by Fiscal Year 2019 133,000
Payments due by Fiscal Year 2020 139,000
Payments due by Fiscal Year 2021 146,000
Payments due by Fiscal Year 2022 and after 1,291,000
Payments due by Fiscal Year Total 1,956,000
Long Term Accrued Liabilities [Member]  
Payments due by Fiscal Year 2017 [1]
Payments due by Fiscal Year 2018 20,000 [1]
Payments due by Fiscal Year 2019 6,000 [1]
Payments due by Fiscal Year 2020 4,000 [1]
Payments due by Fiscal Year 2021 12,000 [1]
Payments due by Fiscal Year 2022 and after 128,000 [1]
Payments due by Fiscal Year Total $ 170,000 [1]
[1] The long-term accrued liabilities for the Management Incentive Plan are discounted to the present value using a discount rate of 6%.