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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Investments Classified by Contractual Maturity Date - Fixed Income Securities [Member]
$ in Thousands
Jul. 31, 2020
USD ($)
FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Investments Classified by Contractual Maturity Date [Line Items]  
Current $ 2,724
Due after one year through five years 3,438
Due after five years 3,188
$ 9,350