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Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands | Nov. 30, 2019 | Aug. 31, 2019 | Nov. 30, 2018
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total debt | $ 116,519 | $ 116,571 | $ 116,724
Less current portion | (210) | (209) | (206)
Less unamortized debt issuance costs | (504) | (516) | (432)
Total long-term debt | 115,805 | 115,846 | 116,086
Revolving Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | 0 | 0 | 0
Elecsys Series 2006A Bonds [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | 1,519 | 1,571 | 1,724
Series A Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 115,000 | $ 115,000 | $ 115,000

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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