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Subsequent Events	12 Months Ended
Subsequent Events	Apr. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On May 29, 2019, our Board of Directors declared a quarterly cash dividend of $0.11 per share of our Class A and Class B common stock. The cash dividend is payable on August 30, 2019 to Class A and Class B shareholders of record at the close of business on August 16, 2019.