Related Party Transactions (Details) - Foundation For Online and Blended Learning - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Related Party Transactions
Contributions made to related party	$ 1.4	$ 0.3	$ 0.5
Accrued contributions to related party	$ 2.5

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