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Revenue Recognition and Contracts with Customers - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Jun. 30, 2020
Refund liabilities $ 3,798,000   $ 3,798,000   $ 3,331,000
Return related assets $ 792,000   $ 792,000   $ 701,000
Sales Revenue, Product Line          
Concentration Risk, Percentage 13.00% 11.00% 11.00% 9.00%