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Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands | Feb. 28, 2021 | Aug. 31, 2020 | Feb. 29, 2020
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total debt | $ 116,256 | $ 116,344 | $ 116,467
Less current portion | (215) | (195) | (211)
Less unamortized debt issuance costs | (442) | (467) | (491)
Total long-term debt | 115,599 | 115,682 | 115,765
Revolving Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | 0 | 0 | 0
Elecsys Series 2006A Bonds [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | 1,256 | 1,344 | 1,467
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=120520924&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=120400017&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=120398452&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=120391452&loc=d3e13212-122682 + Details
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