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Note C - Finance Receivables, Net - Components of Finance Receivables (Details) - USD ($)
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2017
Oct. 31, 2016
Apr. 30, 2016
Gross contract amount $ 631,681,000 $ 584,682,000      
Less unearned finance charges (88,353,000) (83,244,000)      
Principal balance 543,328,000 501,438,000      
Less allowance for credit losses (127,842,000) (117,821,000) $ (109,693,000) $ (4,800,000) $ (102,485,000)
Finance receivables, net $ 415,486,000 $ 383,617,000 $ 357,161,000   $ 334,793,000