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Revenue Recognition and Contracts with Customers - Additional Information (Details) - USD ($)
3 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Jun. 30, 2020
Refund liabilities $ 3,123,000   $ 3,331,000
Return related assets $ 655,000   $ 701,000
Sales Revenue, Product Line      
Concentration Risk, Percentage 9.00% 8.00%