Note 9 - Loan and Credit Agreements - Summary of Term Debt (Details) - USD ($)	Nov. 30, 2018	Aug. 31, 2018	Nov. 30, 2017
Term debt		$ 2,805,792	$ 3,569,491
Less current portion of term debt	$ 221,230	225,405	221,230
Term debt of discontinued operations			599,584
Term debt, excluding current portion	$ 2,748,677	2,580,387	2,748,677
Term Loan Due October 2037 [Member]
Term debt		2,536,987	2,595,007
Term Loan Due October 2019 [Member]
Term debt			599,584
Iowa Finance Authority Term Loan [Member]
Term debt		$ 268,805	$ 374,900

Amount classified as notes payable attributable to disposal group held for sale or disposed of.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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