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- Schedule of debt (Details) - USD ($) $ in Millions | Aug. 31, 2017 | May 31, 2017 | Aug. 31, 2016
--- | --- | --- | ---
Debt (Details) - Schedule of debt [Line Items] |  |  |
Total Debt | $ 12.0 | $ 6.2 | $ 12.1
Line of Credit |  |  |
Debt (Details) - Schedule of debt [Line Items] |  |  |
Short-term debt | $ 12.0 | $ 6.2 | $ 12.1
Weighted average interest rate (percentage) | 3.80% | 4.10% | 4.10%
Revolving Credit Facility |  |  |
Debt (Details) - Schedule of debt [Line Items] |  |  |
Long-term debt | $ 0.0 | $ 0.0 | $ 0.0
Interest rate (percent) | 0.00% | 0.00% | 0.00%

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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