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Term Notes Payable And Line Of Credit (Future Principal Payments By Fiscal Year) (Details) - Credit 2019 Agreement [Member] - Term Loan [Member]
$ in Thousands
May 31, 2020
USD ($)
Debt Instrument [Line Items]  
2020 $ 1,250
2021 5,000
2022 5,000
2023 5,000
2024 5,000
Total $ 21,250