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Summary of Significant Accounting Policies - Concentrations (Details) - customer	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Revenue | Customer A
Number of customers	0	0	0	0
Revenue | Customer Concentration Risk | Minimum | Customer A
Concentration percentage	10.00%	10.00%	10.00%	10.00%
Accounts receivable | Customer Concentration Risk | Customer A
Concentration percentage					14.00%
Content costs from vendors | Supplier Concentration | Vendor A
Concentration percentage	21.00%	18.00%	20.00%	18.00%
Content costs from vendors | Supplier Concentration | Vendor B
Concentration percentage	14.00%	13.00%	13.00%	13.00%

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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