Other assets and liabilities, current and non-current (Accrued Expenses and Other Current Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Other Assets And Liabilities [Abstract]
Deferred warranty revenue	$ 12,101	$ 13,829
Accrued compensation	13,616	13,326
Other taxes payable	15,756	11,700
Accrued marketing expense	5,667	3,813
Accrued freight	2,886	3,383
Short-term operating lease liability	4,476
Other accrued liabilities	22,184	18,578
Accrued expensed and other current liabilities	$ 76,686	$ 64,629