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Note F - Debt Facilities - Summary of Debt Facilities (Details) - USD ($)
$ in Thousands
Jul. 31, 2021
Apr. 30, 2021
Jan. 31, 2020
Debt issuance costs   $ (678) $ (558)
Debt facilities $ 271,824 225,924 271,824
Line of Credit [Member]      
Debt facilities, gross   $ 226,602 $ 272,382